Bikram yoga is a specific style of hot yoga built around a fixed sequence of 26 postures and two breathing exercises, performed in a room heated to at least 105°F (40.6°C) with roughly 40% humidity. Classes traditionally run 90 minutes, though some studios now offer 60-minute versions. It’s one of the most structured and physically demanding forms of yoga practiced today.
The 26-Posture Sequence
What sets Bikram yoga apart from other styles is its rigidity. Every class follows the same 26 postures in the same order, every time. The sequence was designed by Bikram Choudhury, who trained under yoga guru Bishnu Ghosh in Calcutta before moving to Los Angeles in the early 1970s, where the practice quickly gained a following.
The postures cover the full body: standing balances, backbends, forward folds, and twists. Because the sequence never changes, practitioners can track their progress over weeks and months. You know exactly what’s coming next, which lets you focus on depth and form rather than learning new movements. The class begins with a standing breathing exercise and ends with a final breathing technique on the floor, with the 26 postures sandwiched between them.
How Bikram Differs From Hot Yoga
All Bikram yoga is hot yoga, but not all hot yoga is Bikram. The distinction matters if you’re choosing between classes. Bikram studios follow the scripted 26-posture sequence with no variation. Hot yoga classes can include any postures the instructor chooses, and the sequence changes from class to class.
The atmosphere differs too. Traditional Bikram studios use bright overhead lighting and maintain silence during practice, with minimal verbal cues from the instructor. Hot yoga studios tend to feel more relaxed: dimmer lighting, background music, and more interaction with the teacher. If you prefer predictability and discipline, Bikram is the more structured option. If you want variety and a looser vibe, a general hot yoga class may suit you better.
What the Heat Does to Your Body
The 105°F room is the defining feature of the practice. Your heart rate climbs to an average of about 134 beats per minute during class, comparable to a brisk walk or light jog. The metabolic intensity sits at roughly 3 to 4 METs, which places it in the moderate exercise category.
Calorie burn is lower than many studios claim. Some practitioners report burning 1,000 calories per session, but research from Colorado State University found the actual average is closer to 460 calories for men and 330 for women. That’s meaningful, but it’s not the equivalent of running for 90 minutes. Much of the dramatic sweating people experience reflects heat exposure, not necessarily energy expenditure.
The heat does help with flexibility. An eight-week controlled trial found that people practicing three or more times per week significantly improved their lower body range of motion compared to a control group. Balance also improved, as measured by single-leg standing tests. More experienced practitioners tend to have higher sweat rates and energy expenditure than beginners, suggesting the body adapts to the heat over time and can work harder in it.
Metabolic and Cardiovascular Effects
Beyond flexibility, regular Bikram practice appears to influence how the body processes sugar and fat. One study found improved glucose tolerance in obese participants, meaning their bodies became better at clearing sugar from the bloodstream after eating. Older adults in the same research showed decreases in insulin resistance and reductions in total and LDL cholesterol, the type linked to cardiovascular risk.
Blood pressure, however, doesn’t seem to change. Several studies involving people with normal blood pressure found no significant shifts after weeks of regular practice. This isn’t surprising, since exercise typically lowers blood pressure most in people who start with elevated levels. For people already in the normal range, maintaining that baseline is the expected outcome.
Heat-Related Risks
Exercising in a room over 105°F carries real risks that are worth taking seriously. In a survey of 157 hot yoga practitioners, 60% reported experiencing dizziness, 61% light-headedness, 35% nausea, and 34% dehydration symptoms. These aren’t rare side effects; they’re common enough that you should expect to encounter at least one of them, especially in your first several classes.
If you feel dizzy, nauseated, or develop a headache during class, stop immediately and leave the heated room. At least one documented case involved a practitioner arriving at an emergency department with muscle cramps, breathlessness, and nausea before experiencing a seizure. Heat illness can escalate quickly.
Certain groups face higher risk. People with heart or metabolic conditions, those who are obese or have low fitness levels, anyone with a viral illness or diarrhea (which affects hydration), and people with conditions that impair sweating should get medical clearance before trying a heated class. Pregnant women need to be especially cautious, as core temperature increases above 2°C from resting can affect fetal development.
What to Expect in Your First Class
Arrive hydrated. Drink plenty of water in the hours before class, not just right beforehand. Bring a large water bottle, a yoga mat, and a towel. You will sweat through everything. Many studios provide towels, but check in advance.
The room will feel overwhelming at first. The heat hits you the moment you walk in, and the humidity makes it feel heavier. You’re expected to stay for the full 90 minutes, though if you need to sit or lie down on your mat, that’s accepted. Leaving the room mid-class is discouraged but allowed. If you do step out, wait for a break between postures and leave quietly.
Studios maintain silence during practice. No talking to neighbors, no phone use, and only water is permitted in the room. The instructor leads through verbal cues or a set dialogue rather than demonstrating poses, so you’ll spend most of your time listening and following along while watching other students for reference.
Why Many Studios Dropped the Bikram Name
Starting in the mid-2010s, a significant number of Bikram studios rebranded as “Original Hot Yoga” or similar names. This shift had multiple drivers. Several lawsuits were filed against Bikram Choudhury alleging sexual assault, and many studio owners wanted to distance themselves from him personally. A court ruling that the 26-posture sequence cannot be copyrighted made this legally straightforward: anyone can teach the same class without using the Bikram brand.
Some studio owners also saw rebranding as a chance to evolve. The traditional Bikram format separates physical postures from yoga philosophy, focusing entirely on the body with no meditation, chanting, or spiritual elements. That approach appealed to some students but left others wanting more. Studios that rebranded often began incorporating broader yoga teachings, adjusting class lengths, or offering complementary styles alongside the original heated sequence. The practice itself remains widely available; it just goes by different names in many cities now.