History and origin
Hot yoga is practice in a heated room. The fixed class is twenty-six postures and two breathing exercises, about ninety minutes, in a room near 40 degrees Celsius. That sequence is the one popularised under the name Bikram. Other studios heat a vinyasa or a gentler series and still call the hour hot. Heat is the shared fact. The list of poses is not. This page describes the heat and the fixed sequence. It does not praise the man who franchised it.
The heated room spread through commercial studios late in the twentieth century and became, for many people, their first picture of yoga. That picture is narrower than the practice. A thermostat does not make a sequence classical, and a fixed script does not make every hot class the same. Read the timetable. One room will repeat the twenty-six. The next will flow.
Philosophy
Heat changes tissues and heart rate. It does not, by itself, make a pose wiser or a person cleaner. The discipline, where the sequence is fixed, is to do the same shapes in the same order and to leave when the body says stop. Sweat is a side effect of temperature and work. It is not a measure of sincerity, and it is not a cleanse. You practise the pose you already know, under a load the room adds. Ambition in the heat is how people get hurt.
How a class proceeds
Expect a hot room, a great deal of sweat, and either the twenty-six postures with two breathing exercises or a heated flow. The fixed class is long and spoken in a set pattern. A heated vinyasa feels more like an ordinary flow with the thermostat high. Bring water, and drink it before class and between postures, not in frantic gulps while you are balancing.
Dizziness, confusion, a racing heart, or sweat that suddenly stops are reasons to sit or leave. Tell the teacher without waiting for the script to pause. The carpet or the mat will be wet. Towel and grip matter more than a deep variation. Heat is a strain on the heart and on attention. It is not a moral test, and it is not medicine.
Intensity
The intensity is high because the room and the duration add a cardiovascular load to postures that are already strong. Near 40 degrees, ninety minutes is a strain even when you know the shapes. A shorter heated flow can still sit at the top of the week. Skill does not cancel temperature. If you cannot hold a conversation, or the breath becomes ragged between poses, the honest work is to kneel, drink, and stop. Staying in order to finish is not the practice.
Benefits
For a healthy person who already knows the poses, heat can make tissues feel more willing and the same shapes easier to revisit. A fixed sequence removes the question of what comes next, which some people find steadying. You may leave thirsty, tired and clear about your limit. You will not have detoxified anything. Sweat is water and salt. Strength and familiarity come from repeating poses you can still breathe in, not from enduring a temperature for its own sake.
Who it suits
Healthy people who already know the poses and who like heat can use a hot room. It suits a student with a basic standing practice, a habit of drinking water, and no wish to prove toughness. The fixed sequence suits people who want the same hour every time. A heated flow suits people who want variety and can still hear their own limit over the music.
It is a bad idea in pregnancy, with heart disease, with heat illness, or the first time you ever try yoga. It is also a poor choice when you are ill, hung over, or new to inversions and deep backbends. If you are unsure, take the same poses in an ordinary room first. The shapes do not become safer because the air is warm.
Beside similar forms
Power yoga is athletic and sometimes heated, but the sequence changes and the room is not the definition. Baptiste is one named heated power series. Ashtanga is a counted series in an ordinary room unless a studio chooses otherwise. A gentle class with the radiator on is not hot yoga in the sense used here. Hot yoga means vigorous practice in real heat, and, when the class is the fixed one, twenty-six postures and two breathing exercises near 40 degrees. Ask which hour you are entering.
Best positions
Standing deep breath
Stand with the feet together, fingers interlaced under the chin, and lift the elbows on a slow inhale before a controlled exhale. It is the first of the two formal breathing exercises in the fixed series. The breath opens the hour and shows you whether the heat is already too much. If you are dizzy here, the rest of the sequence is not for you today. Sit down and let the room continue.
Half-moon pose
From standing, reach the arms overhead and then side-bend, and afterwards fold and hold the heels or the calves if the hands do not reach. Both legs stay straight only as far as the breath allows. In the fixed series this shape warms the side body and the back of the legs early, before the room feels normal. Bend the knees in the fold. A rounded, breathless reach is not a better half moon.
Awkward pose
From standing, bend the knees into a chair shape, heels down, spine long, arms forward. The thighs burn quickly in the heat. Hold without bouncing. The pose strengthens the legs and shows whether you can stay when the air is already hard. Rise before the low back rounds or you hold your breath. A higher seat is the pose. Depth is not owed to the mirror.
Eagle
Cross one thigh over the other and bend the knees, then wrap the arms if the shoulders allow, and fix the gaze. The standing foot works, and the pose asks for balance while you are already sweating. It trains a steady eye more than a tight wrap. If the foot will not hook, rest it on the shin or the toes. Unwind before the knee twists to chase the full bind.
Standing bow
Stand on one leg, hold the other foot behind you, and kick into the hand while the chest tips forward only as far as the standing hip stays steady. The pose is a balance and a backbend together, and the heat makes people chase the kick. It strengthens the standing leg and opens the front of the lifted hip if the knee is not wrenched. Keep the lift small. A lower chest and a quiet breath beat a deep, shaking bow.
Separate-leg bow
Lie on the belly, bend the knees, and reach the arms back toward the feet, holding the ankles only as far as the breath allows. Lift the chest and the thighs a little, without yanking the feet to the head. The pose is a floor bow: it opens the front of the body and strengthens the back under control. In the heat, range comes too easily. Stay lower than you can, and release if the low back grabs.
Camel
Kneel with the knees hip-width, hands on the low back or on the heels if they reach without a collapse, and lift the chest while the hips stay forward. The neck stays long rather than dropped. The pose is a deep backbend late in the fixed series, when you are tired and warm and more likely to overreach. It opens the front of the body. Do a smaller lift with the hands on the hips if the low back pinches or the breath stops.
Watch a class
A verified class of this form. If a link is not here, none was certain enough to include.
90 Minute Hot Yoga: 26+2 Bikram Yoga with Gary Olson