An Open Letter to Bikram Yoga Instructors About the Heat

Bikram Choudhury has always said the ideal temperature for a Bikram Yoga class is 105 degrees and his web site confirms that with this statement: "The recommended temperature is minimum 105F degrees and about 40% humidity." Bikram's wife and partner, Rajashree, once told a group of teacher trainees that a range of 100 to 105 is sufficient. So why do so many studios consistently crank the heat up to 110 or higher?

As a seven year studio owner, I know it's not always possible to control the heat the the nth degree. There are many factors that make it hard to control the room conditions with any exactitude. Humidity is one such factor that is as important as, and has as much effect as the temperature.  The truth is that temperature alone isn't an appropriate gauge of the proper conditions for a hot yoga practice. We have to keep the humidity level in mind and Bikram has prescribed that to be  "about 40%." But neither number can be considered alone -- it is the corelation of 105 degrees with 40% humidity that is the desired room condition.

At my studio, we have large floor-to-ceiling windows that render us vulnerable to changing external conditions. In the summer our humidity rises significantly and in the winter it falls. We compensate by using de-humidifiers or humidifiers as neccessary but it's a constant struggle to get things just right. It's easier and faster to to adjust the temperature up or down a few degrees than it is to lower or raise the humidity. It is therefore reasonable  to allow some variance in temperature to accommodate for humidity. Frankly, 110 degrees isn't always inappropriate if the humidy level is  low. Similarly, 100 degrees may be more than sufficiently hot when the humidty is high. It is the combined attributes of temperature and humidity that should always be as close to Bikram's stated ideal as possible. Unfortunately, a lot of studios don't understand this.

I've practiced in studios that were not lacking appropriate humidity levels where the temperature was allowed to exceed 115 degrees and I've heard of studios going as high as 120. Those conditions are extreme and bring no added benefit. In fact, such conditions only increase the risk potential, especially for people who aren't fit or experienced in athletic activity --  one significant group of people we're supposed to be attracting.

Bikram claims that his yoga was designed for everybody. "Never too old, never too bad, never too sick, never too late, to start from the scratch again," is one of his mottos. "Anybody can do it," is another. It is called "Bikram's Beginning Yoga Class," after all. One of the greatest things about the Bikram Method is how it was constructed to allow people of all ages, shapes and conditions to practice together. Extreme conditions make that less likely or practical.

Yes, the heat is supposed to add to the challenge. No, Bikram Yoga is not supposed to be easy. Most new practitioners, no matter what shape they're in, will find practicing in a room heated to 105 to be a challenge. For the first several classes, perhaps weeks or months, learning to work with the heat can even be the primary challenge but with time, persistence and experience, almost everybody will acclimate and learn to transcend the uncomfortable aspects of the heat and be able to focus on the yoga. If the whole of one's class is spent merely trying to survive the heat then some of the most significant  aspects of a hatha yoga practice are missing.

Among instructors, one might argue that during our nine week training program we were "tortured" with  temperatures  much higher than 105. We were also required to attend two classes a day and otherwise subjected to an intense regimen of long hours in the studio and little sleep. We were expected to push ourselves beyond our normal capailities and limits to an extreme degree. But we were training to be instructors! At no time during the  certification program were we told  that we were expected to say one thing and do another or  to expose our students to such extremes. We were told "105 degrees" so often that it almost became a mantra.

Go to any Bikram Yoga studio web site or call one and you will see or hear those two words. There is no reasonable argument to be made for raising the temperature much higher than that in most circumstances. I can only speculate that the studios who regularly exceed the recommended temperature are operating in an unspoken  competitive manner -- what looks to me like a kind of "how hot can you stand it" machismo. That's not yoga.

Comments

about the heat

What a brilliant letter!  I have been to studios that are all about 120 with high humidity, and it is just a macho thing.  I worry about the brain and the kidneys in particular, as they do not respond well AT ALL to that level of heat/humidity/overheating.  God bless you for your intelligence and compassion.

Eric Jennings's picture

Thank you.

Thank you.

Amen!

Indeed, NOT yoga! So glad to be a part of your studio! Thanks Eric!

ego

Guess everyone needs a reminder about managing ego, even yoga instructors. Great article.

Monitoring the heat?

Fab discussion, Eric, thanks so much. You've sparked a question from this very new Bikram lover: is there a standard protocol your teachers are asked to follow in order to monitor the temperature in class? I have noticed that some teachers (Decatur Bikram) include monitoring and adjusting throughout class while others don't check even once.

The monitored classes have felt like the temp is consistent beginning to end, while the classes without monitoring have felt excessively hot, with increasing temp beginning to end, and I've noticed that the experienced practitioners are resting more during these classes.

As a newbie, I rest from time to time no matter what, but when I see the pros in a puddle on the floor, it certainly seems to validate my ponderings that the temp might be too hot when the teachers who don't monitor are teaching.

Otherwise, sure am loving you studio, teachers, and vibe, Eric, thank you.

Eric Jennings's picture

It's Tricky

To be honest, Bikram Lover, the closest thing to official policy at our studio is this: Instructors should keep an eye on the heat to make sure it is close to 105 but not spend too much time during class adjusting the thermostats.

I wish it were a simple matter to maintain consistent heat and humidity levels but the reality is that the room conditions are always going to fluctuate according to several factors (which are addressed in the main post).

If an instructor is constantly walking over to and tweaking the thermostats it can be distracting (to themselves and to the students) as well as ineffective. Our heating system doesn't respond quickly to thermostat changes. It can take 30-40 minutes for the temperature to drop (or rise) noticeably after a change in setting. Also keep in mind that it is possible to monitor the room conditions without actually looking at the thermostats. We are in the room with you and we can see the effects of the heat on the students, especially when they are sitting down. Our job isn't to make it more comfortable for the students but to help them find the balance between challenge and struggle.

Part of the Bikram practice is learning to adjust and adapt according to the changing heat levels. The instructors role in this regard is to monitor and adjust the heat level when possible but also to adjust the pace and energy of the class as appropriate. The students role is to pay close attention to how their body feels in class and adjust their practice accordingly. As you've seen, even advanced practitioners need to sit down once in a while.

I appreciate your observations and feedback and will be putting this topic on the agenda for our next staff meeting. All of our instructors should be paying close attention to these things.

heat levels in Bikram Class

The truth is that although 105 and 40 percent is the guide, that is equivalent to a 122 degrees F "heat index". There is a lot of science behind comparing subjective sensations of heat under different temperature and humidity situations. one thing is very clear: discussing heat in terms of temperature only is not adequate. certainly there is a process of heat acclimatization. this process is well understood in athletes, and involves changes in blood proteins which osmotically draw more fluid in the bloodstream (first 2 weeks of enough exposure) so the athlete (or yogi) will have enough blood volume to go to brain, muscles, and cool skin. afte a few weeks of exposure, other changes take place which are adaptations to exercising in the heat. these changes mainly involve circulation changes which maintain blood volume.

another reality is that in every type of physical practice, such a a gym, martial arts, or any other exerciise program, most people will get interested a while but then after a few weeks they go back to baseline and forget all about it (this is true for weight loss or any type of self help program u can name). of course they may say it wass too hot and that is why they quit bikram yoga! catering to non-yogis by making the yoga cooler is not the answer if the studio wnats to cater to commited students and yogis who seek out bikram practice because ofthe benefits.

i went through the heat acclimatization process, and it was not easy. Bikram Yoga is not easy. living with infirmities is not "easy". there is no gain without effort.

105 and 40 percent is 122 heat index. the index changes inside any given class based on a host of factors including students. Best appoach i have experienced is to make SURE it is at least 122 heat index. if it egins to go too high ust a crack of the door and not much fiddling with thermostat works best.

with 7 year of qvid Bikram ractice in many studios, i can relate that my obsevation is the hotter studios with more discliplin retain more long term students, while those who cater to the students looking for something easier than bikram yoga do nothing but water down the practic eby not having their studio up to standard. my experience? Alpharetta is consistently hottest. Decatur and Ponce about the same but as little cooler. Marietta: the koolest classes - lowest heat.

students need to recognize their limits, honor their own practice, and not interpret a yogi who wants heat as come kind of machismo competitor. have the courage to slowly acclimatize, stick with it, and u will c the benefits

Humidity

Hi Eric,

Since three months I am practicing Bikram Yoga in a small studio in Asia. I am practicing other styles of yoga for many years. I love the Bikram yoga. But because of some yoga sessions with too high humidity (60 - 80 percent) in the studio I do not feel like going anymore to the studio at the moment.

After the standing series with excessive sweating, a burning hot red face and arms, I feel burned out. My body feels overheated and I can not concentrate anymore on the postures. Instead of gaining energy during a yoga sessions I loose energy. I do not think this is healthy. By the way I am a very strong and healthy person, nothing wrong with me but with the humidity in the studio!

So the studio has problems with humidity ( 60 - 80 percent !). It is getting worse because the temperature outside is rising. I mentioned a few times to the owner that the humidity is too high and because of this he has to lower the temperature - I read this in a HOT YOGA book.

During my last session I wanted to walk out of class. What is the point of staying if you do not have the energy anymore to do the postures. I stayed but could not do my postures anymore, I faked it.

After the yoga class, I confronted the owner/teacher again. At the moment there is another teacher as well. What happened is this. Both of them agreed of course that the humidity is too high. But they were defensive at the same time (?) and started to give all kinds of examples of other studios and the heat. They gave examples of the BIKRAM TTC and people passing out. One teacher said, if you can not do a posture anymore, lie down. Like I already mentioned, what is the point of that. I come to the studio to practice yoga, not to lie down. What got me the most was that the owner said, I do not like your complaints!

I found this blog because I was looking for some information about the subject: humidity in the Bikram studio. I want to comment on some of the people who also replied on you letter.

KILL OURSELVES. You do yoga because you want to KILL YOURSELVE, strange!

Don’t you have better things to do running your studio? Why is this person so upset, I think this is what you try to do by bringing up the subject.

Stole his series, his heat, his philosophy. Nothing wrong with that I believe (there is also a BURGER KING, KFC). I for example do not like the carpet so much in a studio, maybe someone can explain me why this is necessary. In Bangkok you have a HOT YOGA studio without carpet. I believe this is a reasonable adjustment.

You go to a McDonald's anywhere in the world, and you know exactly what you are going to get. For McDonald’s this can be true but If I understand correctly this is not the case for the BIKRAM studio’s because the temperature is not the same in every studio, I guess this person is not a vegetarian either ;-)

Ok that is it. Thanks for your information.
Ans (Netherlands)

Eric Jennings's picture

First let me apologize for

First let me apologize for the delay in noticing and approving this comment -- I'm still trying to figure out how to get email alerts when someone posts a comment.

Sometimes the problem isn't the heat or humidity. It's the short-sighted (or narrow-minded) instructor or studio owner. 60-80% humidity is extreme. If external conditions make it impossible to reduce in the yoga room that then the obvious solution would be to lower the room temperature.

I haven't done the exact math but 105 degrees with 40% humidity probably equates to something like 90 degrees with 60% or 80 with 80%. Bikram doesn't say 105 degrees NO MATTER WHAT THE HUMIDITY IS. Honestly, some people are idiots.

The Teacher Training program is (and should remain) more extreme than the average Bikram Yoga class taught for a general population of ordinary people. Idiots.

The whole "kill yourself" with Bikram Yoga thing comes form Bikram himself but many (most) people misunderstand what he means. When Bikram says, "Welcome to my torture chamber to kill yourself for the next ninety minutes," I believe he is saying, "Prepare to be challenged both physically and mentally. In order to do Bikram Yoga you must be willing to work hard, be uncomfortable, and abandon everything you think you know about yoga." I believe it is the death of your ego and all it's attachments that is desired.

Carpet is another story. There are ways to do clean and sanitary carpeted yoga rooms. If anyone wants to know how they may call me and I'll explain. Personally, I'm not bothered by wood floors but they can be dangerously slippery when covered with sweat, not to mention uncomfortable to kneel and sit on.

Heat Index and Kolkata

I am enjoying all your comments. I have been doing Bikram Yoga at home in Tallahassee for several years. I look at the heat index of 122. I keep a hygrometer and thermometer in my room. In the summer when the humidity is near 70%, I look at the heat index chart and try to adjust the temperature. So for 65% I have a temperature of about 94-96 F. However I have a small room and two heaters blasting me so the heat is higher where I am then where the thermometer is located. But the winter is a real problem. The humidity the other day was about 25% and it is impossible to raise the temperature above 102, so
I don't worry. It is more important to do the yoga then worry about the perfect temperature. I have missed many sessions in the past because I couldn't get the room above 85 F. I think it is better to get in a session than not. When it is cold, I wear sweat cloths and go slower.

I also believe that since I have these heaters pointing at me that I actually feel a higher heat than a studio. I can tell because I rarely go into a studio that feels as hot as my room!

One other comment that I want to address. I have read Bikram say that he is imitating the weather in Kolkata, India. He would say it was 110 F everyday with high humidity. Of course that is not true. For example during the winter, the high is about 75-80 for several months. And a temperature of 110 F is very rare. So if we did go with the actual weather like Bikram did as he learned yoga in India, then some days are in the 70's and other's will be in the 90's, but only if you do yoga in the middle of the day.

I want to say that your studio is one of the best I have attended. I have been to many studios over the years from Atlanta, Chicago and many studios in Florida. I like to go to a class with a good instructor to help me with my practice. Keep up the good work. Hope to see you one day again!! Irwin Friedman

Eric Jennings's picture

Hi Iwrin. Thanks for the

Hi Iwrin. Thanks for the comment and the positive feedback.

Dear Eric, I really enjoyed

Dear Eric,
I really enjoyed reading your comments about Bikram Yoga. I have been doing Bikram for 1.5 years at a local studio. I have a condition called BPPV, positional vertigo and cannot put my head in certain positions. I have blacked out 4 times in the yoga class, when the heat is excessive and pushing myself into these poses. The studio owners do not like modifications and are always pushing me to try harder, even though they know my condition. I have come to a cross roads as to whether I should continue at this studio or even continue doing Bikram Yoga. Would really appreciate your opinion. Regards Mimi

Eric Jennings's picture

Hi Mimi, You need to find

Hi Mimi,

You need to find another studio to practice at. If you cannot then it may be wise to choose another style of yoga.

It is absolutely and unequivocally wrong for any yoga instructor to disregard a student's medical condition.

(I'm sorry it took me so long to respond to your comment. I thought I had things configured so that i would get an alert when there is a new comment posted but, apparently, it's not working. I just noticed your question this morning.)

I'm sorry to disagree but it

I'm sorry to disagree but it is somewhat ridiculous to assume that Bikram's Beginning Yoga class is geared toward students who have been practicing so long that a super hot/humid room is normal and the people the class was intended for should suck it up or quit. I hear nothing but ego and the idea that only the super macho student can endure as a long time practitioner. I truly hope you are not a studio owner, that would scare me. Heat at 105 I
is more than reasonable, there is zero indication that anything above that is even remotely beneficial. It's not overheated rooms that produce results, it's a person coming back again every day to use the prescription.

excellent point

Yes, you're certainly correct and make a good point about the humidity.  The heat/humidity ratio is definitely not understood, sometimes I wonder if Bikram himself understands the correlation between the two.  So you bring up a good point and all studios owners should read and understand your post.  I also think the reason some studios crank up the heat is because they mistakenly believe higher temperatures = more sweat, a logical assumption but not true--you need the proper humidity!

Eric Jennings's picture

Remember...

It's not the heat. It's the humility!

Heat is a hot issue, indeed!

Eric, thanks for taking the time to write this piece...now I can cross doing the same thing off my to-do list.

For BYD blog readers, by way of background: I am a yoga studio owner, too.  Before we disaffiliated from the Bikram organization this year, my husband and I had been the directors of (the former) Bikram Yoga Bloomington in Minnesota since 2002.  In fact, Eric and I attended Bikram's teacher training together back in Fall 2001.

One of the reasons we decided that the Bikram brand was no longer a good fit for our business was what we saw as an alarmingly obsessive focus on the physical environment, specifically the temperature of the practice room.  And as Eric points out, that focus generally skewed towards "MO HOTTAH, MO BETTAH" -a rigid, non-negotiable dogma whose adherents are usually the younger, physically more agile practitioners.  Can you spell "exclusionary," kids?

An interesting bit of trivia is that during our 2001 teacher training, the room temperature in our classes which were taught by Bikram himself (and his wife Rajashree, as Eric mentions) was seldom excessively hot.  The only thing I actually remember Bikram ever saying about the classroom's heat level was "turn it DOWN - I don't care about you guys, it's too hot for me in here!"  However, when Bikram's glassy-eyed, fanatic "disciples" were teaching, it could never be hot enough.  Their m.o. was to kick up the heat till half the room had either thrown up or passed out...then boast afterwards how they'd "killed 'em today" in class.  Eric makes a good point that in a teacher training environment, extreme challenges can occasionally have their place in the scheme of things.  But if you're running a health-oriented business open to the general public, abusing your paying customers is a very poor strategy.

So now, 30 years or so after Bikram introduced the "hot yoga" concept to the West, and a decade or so since it really caught fire (hah!), heated-room yoga classes in several different styles are widely available in health clubs and yoga studios alike.  This once-radical notion has steadily become more mainstream, and for good reason. Moderately heated rooms for yoga practice just make good body sense: the heat warms the muscles for deeper stretching, the sweating accelerates detoxification.  But hey, folks...just because SOME heat is good, does it follow that MORE heat is better?  Say you're baking a cake, and the recipe says to put it in a 350° oven for an hour.  Why not just bake it at 475° for 40 minutes, then?  Well, why don't you give it a try...and let me know how that works out for you.

At our studio, we now offer two heated yoga class formats: a "hot" class where the temperature range can vary from 98°-105° (depending on humidity-temperature ratio), and a shorter "warm" class with a heat range between 85°-95°.  Not only is the recently added "warm" class attracting a whole new group of clients, we've been welcoming back many former students who couldn't take the higher heat, but had enjoyed their experience of yoga with us enough to return as soon as we began offering another option.  By the way, that warm class isn't just for "wimps" who can't take the heat.  Many of our veteran hot-room fans have been telling us that they are now enjoying the warm-room class on its own terms, as a complement to their hot-room practice.  They've discovered there is joy in actively creating agni (fire, or internal heat) from within via mindful breathing and focus, rather than merely being passively heated by a mechanical system.

So thanks, Eric, for damning political correctness and saying what has needed to be said for a long time.  You and I may be thousands of physical miles apart nowadays, but once again, your process parallels mine.  Right on, my brother.

In closing, for those who insist there's "only one right way" to practice hot yoga, here's a radical thought: No matter how flexible one's body may be, when the mind is inflexible, life is still out of balance.

Laiki Huxorli
Director
The Yoga Pioneers of Bloomington
www.theyogapioneers.com

 

Pioneers?

Just what are you pioneering? You are all Bikram certified, stole his series, his heat, his philosophy, and now can't hack the requirements. there is a reason that branding works. You go to a McDonald's anywhere in the world, and you know exactly what you are gonna get. You go to a "hot yoga" studio, just what is that, and what does that mean? Now you have your own teacher training, to teach teachers who are only certified to teach at other "hot yoga" studios. If you want the real thing, go get it. Go to a real Bikram studio. Avoid the fakers

heat and such

it entirely depends on the school as to what is 'appropriate'.  I as a teacher and owner am constantly trying to find the right balance between heat, humidity, and the right 'feel'.  when I take class, it should be hot enough to make me suffer a bit.  If I find class not hot and easy, then the heat/humidity is off.  If a lot of 'seasoned' practitioners are on their knees halfway through standing series, then the heat/humidity if off as well.  Good air circulation, lots of oustide air coming in for O2 are both key ingredients.  Our school tends to be hotter if only measured by temperature, though with the air circulation it never feels like you are in someones hot shoe, know what I mean?

HEAT up or down

 I am very interested in the heat aspect of Bikram Yoga.  I have been practicing for a year and have experienced many unexpected benefits.  I have been in the habit of taking my body temperature with an electric themometer.   The temps have ranged from 100.4 to 102.9 (highest ever).  I have researched the benefits of fever.  There are many.  Fever kills or inables bacteria, funguses and viruses.  Fever also stimulates the immune system to produce white blood cells and T-cells.  And, an increase of heat speeds up most chemical reactions.  Basic chemistry.     I have had the challenge of Hiv for 20 years.  T-cell count had been 6 at one time.  Two months ago, no virus was detectable and T-cell count had increased 114 points.  I have a new excitement about life, what the future holds and how I can share my experience with others.  Thanks you Eric.  Really grateful for your dedication.  Craig

Eric Jennings's picture

Body Temperature

This is interesting. I've always believed that our body temperature does not rise significantly during a Bikram class and a couple of instances of monitoring someone's temperature during class bore that out. Since Rebecca told me you were seeing some temperature rises I decided to do some more testing of several students to see if your situation is an anomaly or typical. We're just getting started but we are seeing a small rise in almost everyone we've tested so far. We've mostly tested in the morning and since our body temperature is generally a little low in the morning's anyway it's not surprising that there's a slight increase during class. I'm really curious to see what happens when we test more people at evening classes.

It's too bad there haven't been any major clinical trials done with Bikram Yoga. Bikram says he's trying to arrange some so hopefully it'll happen soon. Practitioners know that there are amazing benefits but the only thing we have to prove it is our own personal experiences. I've heard enough anecdotal evidence over the years to be a believer but it would be great to have some science behind us.

Congratulations on your success with staying healthy. Keep us posted on your progress and I'll let you know what we find out with our own tests.

Your heat is not my heat

Once again, another blog about the heat in the studio.  Yes, the ideal has always been 105 degrees with 40% humidity.  But I do not know of a single (affordable) heating system that can achieve such conditions on an everyday, every single weather circumstance.  It depends on the type of system you have to heat the room.  I see that you use radiant heat, which I assume are the radiant panel mounted on the ceiling.  You might as well call it a microwave.  It "radiates" heat down onto you, basically cooking you from the inside out.  These systems generally always feel HOT.  But take a forced-air gas heating system, with constant air circulation, and the room will feel a bit cool.  The air passing over sweaty bodies will cool them, and depending on the humidity, it may not feel hot enough.  I can run my gas heat around 120 degrees.  does it feel hot, no, not usually.  But if i dropped it to 105, i would freeze.  We do not have that competative edge as you call it.  We simply understand that different systems run differently.  So to write this letter bitching about the heat at some studios, you are basically saying you are the best, and the rest of us suck.  Why even mention this?  Dont you have better things to do running your studio?  If a student tells me it is too hot, i tell them that it is different every single day.  if you want consistency in this life, well, you will be sorely dissappointed.

Eric Jennings's picture

Feeling a little defensive, are we?

I acknowledged in my post that it's difficult to maintain consistent ideal conditions so we're agreed on that. I also suggested that it's reasonable for the temperature to be higher when humidity is low (and vice versa).

The use of radiant heat doesn't preclude the use of air circulation. We use our furnace's ventilation system along with our radiant heat panels. In fact, we also use forced air heat in addition to the panels in the coldest part of Winter. I find it curious that you feel radiant is somehow hotter than forced air -- my experience is the opposite of that and I have received some feedback saying the same. Still, it's probably subjective and not worth debating.

Frankly, I think 120 degrees is excessive, no matter the humidity level. However, it's possible your system is inefficient to the degree that your room isn't able to hold the heat well and the actual heat index (temperature and humidity combined), coupled with good air circulation, may result in conditions approximating the 105/40% balance. On the other hand, it's possible you're needlessly raising the temperature higher than it ought to be.

Why did I mention it? Good question. I'm not sure why except I like to write about my experiences and I have been to some studios that have been excessively hot. I suppose I thought I might be able to influence some people by reminding them what we were taught.

Your final sentence is humorous, presumably coming from a Bikram Yoga studio owner. The consistency of the Bikram method is exactly what I seek when visiting other studios and exactly what Bikram says he wants us to maintain. As professionals we have an obligation to provide the most consistent teaching we can, albeit within the framework of imperfection and constant change. Funny, ennit?

heat in decatur

I've practiced Bikram in many cities...i used to be blessed to live right down the street from your studio...now i am in the hinterlands of marietta...yours is still the best...the best instructors, the best energy, the cleanest studio, the friendliest instructors...i could go on and on but suffice it to say, BYD is the best!

Eric Jennings's picture

Thank you

Thank you

Too Hot to Be Healthy?

Another point to consider is that many of us hope to be practicing Bikram Yoga for many years, perhaps for the rest of our lives. This is a long term life style choice. If the heat is excessive, will we find out down the road that it's actually been harmful to our health?

The whole point of the heat, I thought, was to warm up the muscles and improve our flexibility, so that we could practice yoga. I don't think it was ever meant as a macho challenge as to who could stand the most heat. As an older practitioner (58 years old - for 2 years - 5 times a week) who has some problems breathing when the heat is excessive, I mostly attend early morning classes when the heat tends to be more moderate.

What about retention rates of new students? Is excessive heat turning people away from Bikram Yoga? Owners may want to consider this if their retention rate is one out of every hundred new students (as quoted to me by one studio owner). If moderate heat allows more people to practice this yoga and does not compromise its essence, why not consider it?

I'd like to see more people benefit from both the heat and the yoga, rather than have it become an insurmountable obstacle.

John Dorig

Eric Jennings's picture

Exactly

John, you nailed it. Bikram says his yoga method was designed for everybody and we take him at his word. There will always be some people for whom the heat isn't desirable but a typical Bikram Yoga class ought to have a variety of body types and ages.

In addition to the benefits the heat brings it should also bring an added challenge to the practice but it shouldn't become the primary challenge for the average practitioner once they get past the initial period of acclimation.

Thanks for the reply.

Don't Scare!!

Another angle to this, is that I am also SLOWLY coming to the realization that I can do a lot to increase or decrease my discomfort/anxiety around the heat. As you say, the heat does bring an added challenge to the practice and for me that added challenge is as much mental/emotional as it is physical.

Lately, I've had some success in calming the mind and focusing my attention on the three antidotes to agitation around the heat, which are: normal breathing, stillness, and relaxation. I come to class a half-hour early and do a little mental ritual that helps me let go of my apprehension/irritation and helps me get more benefit out of my practice.

John Dorig...

Thank you for this insight,

Thank you for this insight, Eric. Since I have practiced in several cities, I have often wondered about this... I have been to a studio that regularly boasts 115+ temps. I am glad that you have not only an interest, but also a good understanding about the heat vs humidity during class. For me, the heat does provide a challenge, but also a comfort, since I am very cold-natured. Thank you for your continued efforts in increasing our understanding and appreciation of the practice, while also making sure that we are practicing safely and effectively.

Jada

I disagree with the premise of this article

I feel like a bigger issue is studios that are not hot enough. Studios that keep it under 105. I have practiced all over the world in studios, yours included, and I find that many, many more studios err on the side of too cold than too hot. That's my experience anyway. I do like the heat though and don't have a prob with 110 or 115. So, personal preference enters the equation and you can't please every personal preference when we are practicing as a group. Overall, it's part of the equation that we have to deal with and not let steal our peace. Hot or cold, we have to concentrate, breathe, listen to the dialogue and KILL OURSELVES!!!!!! :).

Thank you for a great site, studio and teachers.

Waylon

Eric Jennings's picture

you're right about that

You're absolutely right that we can't please every personal preference. That's why our approach is to choose a standard (the one established by Bikram) and try to stick to it as close as possible.

Thanks for the comment and recognition.

In hot environments the body

In hot environments the body responds to Heat Index. HI is a function of both temperature and relative humidity, RH. At 105 F degrees, humidity has more of an impact than temperature to the HI result.

If Bikram's target is 105 F @ 40% RH, the Steadman Heat Index formula used by the National Weather Service returns a temperature of 123 F.

To achieve the "feel" of a 123 F HI at 100 F, 53% RH is necessary.
To achieve the "feel" of a 123 F HI at 110 F, 30% RH is necessary.

If you don't have a science background, this combination of temp and humidity is directly related to specific humidity, not relative humidity. Please go to Wikipedia and learn about Specific Humidity.

The number of students in the class has an enormous impact on the amount of water vapor in the air as class proceeds. Both respiration and perspiration add a non-trivial mass of moisture to the air. My class grows about 1% RH for each student when measured during tree pose. Your class may be different depending on room size and type of HVAC system.

Given a 20 student class and a RH target of 40%, if the RH at the beginning of class is 20%, its probably OK to not do a furnace burn if its a bit above 105 F at the beginning of class. What most teachers do is add heat while the students add moisture, then over correct the temp too cold, or don't correct at all until I feel like a chicken pot pie. Often I finish class at 108 F with 50% RH, which is a 145 HI. This is too friggin hot and ruins savasana, which is the most important pose.

The elevated temperature goal of Bikram yoga is to protect the muscular skeletal parts from injury while permitting a greater range of motion, and to clean the body with perspiration, and some deeper physiological stuff with blood, etc. A class with too high a HI does not help these goals, is dangerous, and discourages many customers from returning to class to pay your salary. Heat freaks can wear additional clothing to add heat. There is no way to remove heat for those who find it unhealthy.

Sattyam

Sattyam, I truly appreciate

Sattyam,

I truly appreciate your comment. I live in an area that gets over 116F in summer and hear from teachers at other studios how hot our studio is. We often hear instructors quote Bikram, but I think they miss the truth underneath. You never want someone walking out of your studio and dying. In this area we have many who suffer heat stroke or heat exhaustion who don't do Bikram. Yes, push yourself and know your limits. What you eat and how well you hydrate have major impacts on Bikram performance. But headaches and nausea are also symptoms that the body is too hot. One should never take pride in how many students they make throw-up. How well are the instructors trained in first aid and recognizing heat exhaustion or heat stroke?

We have a young, great instructor who teaches twice a day and then takes both beginner and advance classes. The instructor is wonderful, especially with large classes where the instructor keeps the air appropriately circulating. The instructor is always concerned when people get sick. But in the small classes, there is no circulation when people start showing signs of heat stress. I actually have greater difficulty in the smaller classes because the humidity/heat and air ciruclation is not correct and what I can do ends up with me sitting. The instructor focuses on temperature. I've tried to explain that the body cools itself when sweat evaporates off the skin (not just sweat sitting or rolling off the body). When too much humidity exists and there is no circulation, people struggle. Yes, sometimes it is just me and I take responsibility for hydration and food intake. But I have sat through too many classes now, and see a pattern. The instructor asks what is wrong with the students when half the small class is struggling. I no longer will say anything to the instructor since the last response I received was, "I'm a good teacher." The instructor is a good teacher, but needs to understand what a little air movement can do. A truly advanced, young instructor needs to understand that the heat perception for the instructor is different than the perception of about half the students.

If the goal is to have only young, strong, and healthy clients, then totally ignore signs of heat problems. If someone dropping dead after class isn't a concern, hotter and more humid than recommended should be applauded and emphasized. I believe Bikram's intent is right, but why do some instructors lack the experience or first aid training to properly interpret what they see. Let's face it, those of us who are older and damaged got that way because we felt harder and faster, while disregarding injury, was a sign of true strength.

I agree with Bikram's in terms of evolving into someone new and better. Evolution will not come if too many are getting sick. Thank you to the instructors who help me improve and know how to properly acclimate a fluctuating environment. To those who still learn, temperature feels different to everyone. If people are struggling who usually would not, something may not be right. The students are not the teachers and should not be asked, "What is wrong with you?"

Eric, what does Bikram say (mean) about air circulation? Thanks for the great blogging area. This is the most level-headed and informative sight I've seen.

Eric Jennings's picture

I do not recall Bikram

I do not recall Bikram specifically addressing air circulation but during my training there was always some air blowing somewhere in the room and they occasionally opened a couple doors to bring in fresh air. I learned quickly by experience that there needs to be some moving air in a room to facilitate evaporation of sweat. The only time we turn our auxiliary fans off is during the cold winter when it's difficult to get the room hot enough. Once Spring hits the fans stay on during every class.

To reiterate my main point: the heat should bring a challenge to the practice but it shouldn't be the only or the primary challenge. Student also need to be able to focus on the asanas.

Young instructors should be mentored for a year or two so they learn all this stuff that is not addressed in sufficient detail during our training. One problem is that new instructors often don't realize that what we get put through in training is more extreme than what we are expected to put our students through.

Thanks for the comments.

I find Eric's and Sattyam's

I find Eric's and Sattyam's comments very intelligent and well thought out.

In the studio I used to frequent, and used to love because of the instructors and the balance that was kept between heat and humidity, but that started changing last year. The studio has no thermometer or barometer, so it is up to the teachers to guess. From many years of 5 times a week practice in rooms with gauges, I have learned that when the humidity is over 45% at 105 degrees, I start having a great deal of trouble getting enough oxygen to do the work, and I'm well into negative territory as far as benefits. What is the point of 110 degrees with 60% or more humidity when I can't breathe well? If I have trouble breathing, I can't do the work.
I gently approached the studio owner and some instructors with this, and the studio owner was extremely defensive and told me to go practice elsewhere. There is one instructor in particular who gets the other instructors ramped up about making the room as hot as possible and as humid as possible. That is in winter and summer both (even though winter here is not cold). I brought a little meter in with me once and the humidity was 62% and the temperature 110. That is off the charts on the heat index range and considered beyond extremely dangerous. Hard to see the benefit in that.

Thanks so much for the info

Thanks so much for the info and sharing your perspective on this topic. I am a new Bikram's student in Alabama and notice that when the room is hot but not overwhelmingly so I am able to stretch more deeply and concentrate on my practice in a wonderfully satisfying way. I leave feeling renewed. Unfortunately the room more often than not is kept so hot that I and several other students feel so nauseated and dizzy that we have to sit out some of the postures and hold back from pushing ourselves on others so we can make it through the class. When any mention of temperature is made the instructors tend to get defensive and say things to make you doubt yourself. After my first class I mentioned finding the heat challenging and was told: "If you're feeling nauseated that means you must have eaten or drunken or done something you need to sweat out." The other day a woman became so hot and sick during the class that her friend called 911. Unfortunately that hasn't caused a reduction in the room temperature. In fact during my last class the room was hotter than ever. I did notice the instructor constantly running over to check the temperature. (Whatever she was trying to keep it at, it was way too hot.) I feel what she should be noticing is how many of the students were struggling and having to sit out postures. I quite doubt that having the room a little less hot would impede any advanced student. With heat as any physical training challenge there comes a point of diminishing returns vs. the risk of injury. After my introductory offer month is up I'm not going to be attending any more classes at this studio. Luckily there are many other places to take yoga in Alabama. Hopefully I'll get a chance to visit your studio the next time I'm in Atlanta.

Eric Jennings's picture

You're welcome and thank you

You're welcome and thank you for sharing your story. I understand a studio policy of not allowing feedback about the heat because that opens the door to a lot of people who might prefer it to be 90 or 120. The proper heat settings aren't about pleasing people -- it is about maximizing benefit and minimizing risk for the majority of practitioners. But such a policy has to be backed by a commitment to offer a safe and supportive environment for everyone who walks in the door. Regarding the heat, that is determined by Bikram as 105 degrees with 40% humidity. My experience confirms and supports that.

OMG, Eric. I am so happy I

OMG, Eric. I am so happy I found this blog post. I was looking everywhere for confirmation of my concerns after I ended up in the ER earlier this year. Looked for info on dangers in various yoga pubs to no avail. But found your post just now when googling heat/humidity index and Bikram. I am posting the note I sent to the studio owner in Washington, DC after the incident.

DearXXX: I am writing to express serious concerns with your studio. First, a little background. I am very experienced in yoga, and have practiced hot yoga, albeit not Bikram, several times. Most recently, in March, I practiced hot yoga in the high altitude setting of Sun Valley, Idaho with no ill side effects.

So, during DC Yoga Week, I decided to give Bikram a try to see if I might want to expand my practice. I looked at your website, which explicitly says:
Each instructor honors the experience of each student and is committed to sharing the yoga practice through compassion and love.

On the other hand, the link from the DC Yoga Week page didn’t mention the need to drink copious amounts of water prior to attending, nor the need for a towel.

But that is merely a digression. I showed up for the noon class on May 19, where it was fully apparent I was a newbie. Although sporting a water bottle, I had no towel and I had to sign the first-timers sheet. So, the instructor knew I was new. 20 minutes into the session, I started feeling a bit light-headed. After 30 minutes, having experienced previous bouts of heat exhaustion that had left me in the ER, I decided I would quietly leave. I am aware it is not polite to leave a yoga class early, but I was trying to honor my body.

Unfortunately, despite the statement quoted from your website above, your instructor had no such honor for me or my experience. When I rolled up my mat and started heading out when the door, the instructor said, “Oh, oh“ loudly into his mic (as if to say, “hey, everybody, weak man down”). He literally blocked my path and said I should stay. I told him that I had suffered from heat exhaustion in the past and that I was feeling lightheaded. He insisted I stay in the room and just sit out a few poses. Feeling humiliated and on the brink of tears, I did as I was told. I repositioned my mat, sat and drank water. To the instructor’s credit, he did refill my water bottle.

I tried a few more postures, but after another 30 minutes of alternating between posing and resting, I couldn’t take it anymore. I waited until the break between the standing and sitting poses and quietly left the room. The instructor chased after me and started chastising me, telling me I was panicking. He also mentioned I wasn’t breathing correctly, which may be true. But I wasn’t panicking. I was honoring my body, which I have learned to do after 10 years of yoga instruction. After five minutes of berating me for “panicking”, he went back into the room to teach the last 40 minutes (the class ran long). Why he spent the five minutes scolding me and not unlocking the office door so that I could 1) rest in a comfortable place 2) get more water or 3) get my things and go was inconsiderate at best. Fortunately, as I was sitting on the steps outside your locked office, a yoga instructor from the studio upstairs came to my rescue. I was able to get plenty of water from her studio in order to wait out the rest of the time until the class ended and the door was unlocked. Because I had to wait, I was delayed in getting home to try to fend off the ill effects I was on the brink of experiencing….I.E. icing myself down, drinking an electrolyte concoction, resting, etc.

Indeed, when I got home, the familiar symptoms of heat exhaustion intensified. I called my doctor, whose nurse suggested I immediately get myself to the ER. I have attached the result of that visit--a diagnosis of dehydration and heat exhaustion.

I would advise you to advise your instructors that next time someone wants to leave the room, especially a new client who expressly mentions a history of heat exhaustion, perhaps they should honor the client’s wishes. As I said, I have done hot yoga before, so I didn’t think I would be putting myself in physical danger by coming. Plus, I am in shape and experienced in yoga. So, it’s not like I was in over my head. Whether due to lack of water, the excessive heat, or even the time of month, my body reacted unusually and I know my body better than your instructor. I guess I should have tackled him in order to leave the room after 30 minutes, which would have saved me a lot of pain, aggravation, and money.

While I am sure the instructor will give you a sanitized version of the story, the proof, as they say, is in the pudding and the ER receipt. I can only hope my story saves others from a similar fate. ---

Turns out, the instructor supported all my claims.
The moral of the story, aside from me never doing Bikram again...newbies must be properly warned.

Eric Jennings's picture

Wow, what a story. I'd like

Wow, what a story. I'd like to say more but I'm exhausted after a long day. I will revisit and comment later. Thanks for sharing.

Eric Jennings's picture

One of the primary

One of the primary responsibilities of a yoga instructor is to ensure the safety of everyone in the room. It is sometimes prudent to advise a newbie to stay in the room if it is clear that they are not in distress but the yoga instructor never has the right to force anyone to do anything that they are not ready or willing to do.

I applaud you for speaking up and sharing your story. It has inspired me. I am going to write an addendum to the original blog post that started this thread in which I will talk about if or when it may be acceptable to ask someone to stay in the room (the short version is that it's sometimes OK to help someone face their fear but it is never acceptable to force them to).

I have attended many Bikram

I have attended many Bikram studios around Australia and have noticed that it is not the local instructors that overheat the room but American instructors. Is this a symptom of a competitive natured culture?

Eric Jennings's picture

Is that a rhetorical

Is that a rhetorical question?

I won't speak to differences in culture, nor do I see value in validating or contradicting gross generalizations (no matter how reasonable). But I will say that it should be the responsibility of the studio owners and/or managers to regulate and monitor the heat. The only culture that affects the heat at Bikram Yoga Decatur is our own, carefully cultivated one.