History and origin
Isha is the organisation of Sadhguru Jaggi Vasudev, based at the Isha Yoga Center near Coimbatore in Tamil Nadu, with centres elsewhere. It teaches classical-style hatha programmes, including Angamardana, a physical conditioning set, Surya Kriya, and a sequence of yogasanas, and it teaches meditation practices such as Shambhavi Mahamudra inside the Inner Engineering course. The posture work is real and physical. The kriyas are taught in a course, not from a page or a video.
This page takes the postures as postures. Larger claims about what the practices do belong to the organisation, and they are not stated here as facts. The founder is named so you know whose school this is. The description does not praise him and does not prosecute him. What you can verify by attending a hatha module is repetition, alignment and effort. What you cannot take from this guide is the technique of the seated kriya. That stays with the people who teach the course.
Philosophy
The school speaks of classical yoga made precise for a modern student, and of inner engineering. Precision, in the hatha hall, means a counted repetition and a shape built rather than collapsed into. The engineering metaphor is the organisation's. You can take the counts and leave the metaphor. Instruction belongs in the course. A webpage that prints a kriya is not being more generous. It is being less accurate, because the method is given with corrections you cannot receive from a paragraph.
How a class proceeds
In a hatha module, expect repeated postures, some of them strong, with attention to the feet, the knees and the breath. Squats, sun-sequence folds, backbends held briefly, and balances near a wall are ordinary. You will be corrected. You will be asked to continue a count. In a meditation course, expect a seated practice whose actual steps are not written here. Both ask for a commitment of time. Neither replaces medical care.
This is too organised for a casual drop-in, and the advanced kriya is not a beginner experiment. Book the level you were admitted to. Tell the teacher about blood pressure, glaucoma, pregnancy, or a back that does not like repeated flexion. Sweat is likely in the physical programmes. A wall and a rest are part of a sane class. Leave a shape that argues with a joint, even if the count has not finished.
Intensity
The physical programmes sit at a clear moderate-to-strong effort. Repeated squats and sun work raise the heart rate and tire the legs. You should still be able to keep a line in the knees. Shaking is a reason to pause, not a badge. The meditation course is quieter in the muscles and more demanding of time and attention. Intensity here is rated for the hatha a new student is likely to meet, which is a three on this scale. It is not a gentle stretch class, and it is not a competition.
Benefits
Repeated, taught postures can make the legs and the back more specific: you learn where the feet are and how many times you can repeat a shape before the line goes. A counted practice is easier to remember than a mood. The course structure suits people who will not design their own week. None of this treats an illness, proves a doctrine, or replaces a clinician. The benefit is training and a clear syllabus. If a result is promised beyond that, it is the organisation speaking, not the squat.
Who it suits
The programmes suit people who want a structured Indian syllabus and will learn it from a teacher, including the corrections. They suit a reasonably fit beginner in the introductory hatha, and a committed student in the longer courses. They are a poor match for a casual drop-in, and the advanced kriya is the wrong experiment for a first week.
They are also a poor match if you need the room to stay silent about the organisation's wider claims, or if you want a gentle therapeutic hour. Ask which module you are entering. Angamardana is not a meditation sit, and a meditation course is not a leg day. Neither is a medical appointment. Bring your own limits with you. The count does not know them.
Beside similar forms
A drop-in hatha class at a studio may use similar shapes and none of this syllabus. Art of Living is a rhythmic breath course under a different teacher, with easier poses. Surya Namaskar in a general vinyasa is a relative of the sun work here, without this school's counts or its kriya. Isha is these named programmes and this organisation. If the hour is athletic, you are likely in a hatha module. If it is a seated course practice, you are past what a guide should reconstruct. Ask for the name of the module before you compare it with anything else.
Best positions
Squat and rise
Stand with the feet a little apart, heels down if they can be, and sink until the thighs work, then rise without bouncing. The knees track over the toes. Hands can reach forward for balance. A set of these wakes the legs and is a basic strength shape in the physical programmes. Stop before the knees cave in. Hold a wall if the heels will not stay down, or shorten the depth.
Sun-sequence fold
Inside a counted sun practice, fold forward from standing with the knees soft enough that the back stays long, and keep the breath even rather than held. The hands meet the shins, the floor, or blocks. Rise on the next count. The fold trains a hinge you can repeat without yanking the hamstrings. If the head pounds, shorten the fold. The school's full count belongs to the class, not to this sentence.
Upright seat
Sit with the spine long, on a cushion high enough that the knees can rest, hands on the thighs. This is the posture a seated course begins from. The actual kriya is not described here, because it is taught in person. The seat itself lets you stay without gripping the jaw. If the hips will not allow the floor, use a chair. The technique does not become more real by becoming more uncomfortable.
Brief locust
Lie face down, the hands by the ribs or long by the sides, and lift the chest and the legs only a little, then release. One or two breaths. The shape strengthens the back extensors used in upright sitting and in the stronger programmes. Keep the neck long. Skip it in pregnancy and when the low back is acute. A small lift repeated cleanly beats a high lift that collapses.
Wall balance
Stand near a wall, shift the weight to one foot, and lift the other only as high as the standing knee stays quiet. A hand may touch the wall. Hold for a few breaths and change. The balance trains the ankle and the attention without asking for a free-standing display. Use it when the programme includes standing work. If the room moves, both feet return to the floor. The wall is a tool, not a failure.
Lying rest
At the end, lie on the back with the legs released and the arms away from the sides. Stay until the breath is ordinary. The rest lets a strong module settle so you do not leave still holding a squat in the jaw. It is not a kriya and not a nap you must achieve. Roll to the side to sit up. If you are dizzy, stay down longer. The syllabus can wait.