Classes vary enormously under the same name, and knowing what physically happens in each style makes choosing considerably easier.
The styles and what they load
Flowing styles link postures to breath and move continuously, producing sustained moderate cardiovascular demand and repeated loading of shoulders and wrists.
Alignment-focused styles hold positions longer with props, producing sustained isometric loading and more attention to individual positioning.
Fixed-sequence styles repeat a set series, which allows progression to be measured and provides less individual adaptation.
Heated styles add thermal load, which increases perceived flexibility and cardiovascular demand and increases fluid loss.
Restorative and passive styles hold supported positions for extended periods, producing sustained low-load stress on connective tissue.
Where injuries occur
Surveys and case reports identify recurring patterns.
Wrists, from repeated weight-bearing in positions the joint is not adapted to.
Shoulders, particularly in transitions lowering under control.
Hamstrings, from repeated end-range loading, producing a characteristic tendon irritation at the sitting bone.
Knees, from forced rotation in seated positions where hip mobility is insufficient.
And the lower back, from deep extension.
The adjustment question
Physical adjustment by teachers has been the subject of substantial reconsideration.
Which follows both injury reports and concerns about consent.
Consent cards and asking before touching have become standard in many settings, and a teacher who adjusts without asking is departing from current practice.
Teacher training
The commonly referenced qualification is a private registry standard rather than a regulated credential.
Which means the title covers an enormous range of actual competence.
Training in anatomy, contraindications and injury recognition varies considerably and is frequently minimal.
Asking what training a teacher has in working with injuries is reasonable and the answer is informative.
Hypermobility
People with excessive joint range are frequently drawn to these practices and are the group most at risk.
Which is because positions come easily and the joint has insufficient stability.
The appropriate approach is strengthening and controlled range rather than pursuing further flexibility, and a physiotherapist can advise.
Breath practices in class
Basic breath coordination is generally uncontroversial.
More intensive practices involving prolonged retention have real physiological effects and standard contraindications.
Anyone with high blood pressure, a cardiac condition, glaucoma, or who is pregnant should ask specifically before participating.
Choosing a class
Trying several styles, since they differ more than the shared name suggests.
Telling the teacher about any injury or condition before starting.
And treating discomfort in a joint, as distinct from a stretching sensation in a muscle, as a signal to come out of a position.
Props
Blocks, straps, bolsters and walls make positions accessible that would otherwise require range the person does not have.
Which is a functional adaptation rather than a lesser version, and traditions using them extensively exist.
Reluctance to use props is a common source of forcing positions and of injury.
Progression
Building capacity gradually rather than attempting demanding positions early.
Which is the same principle as any physical training, and it is frequently ignored where a position looks achievable.
Inversions and arm balances in particular require substantial shoulder and wrist capacity that develops over months.
Pregnancy and postnatal
Specific adaptations are needed, and classes designed for it exist.
Which covers positions to avoid, changes in ligament laxity and abdominal considerations.
Anyone pregnant should tell the teacher and preferably attend a class designed for it.
The philosophical content
Classes vary from purely physical to including substantial philosophical material.
Which is a legitimate range, and knowing what a class involves before attending avoids mismatch.
Class size and attention
Large classes reduce the individual attention available, which matters most for beginners and for anyone with a condition.
Which is worth asking about, and smaller classes or individual sessions are a reasonable starting point for anyone unsure.
Progression over time
Capacity develops over months and years, and comparing yourself to more experienced practitioners is not informative.
Which is obvious and is routinely ignored in an environment where everyone is visible.
What it does for fitness
Provides flexibility, some strength particularly in the upper body and core, balance, and modest cardiovascular demand in flowing styles.
Which is a reasonable range and does not replace dedicated cardiovascular or heavy resistance training for those specific adaptations.
Treating it as complete fitness leaves gaps, particularly in loading for bone density.
Beginners
Classes designed for beginners move more slowly and explain more, which matters more than the style chosen.
Which is worth seeking out, since starting in a fast general class is where injury and discouragement concentrate.
Telling the teacher it is your first class is normal and useful.
Home practice
Practising independently avoids the pacing of a class and removes the feedback a teacher provides.
Which suits people who know what they are doing and produces problems for beginners working from video.
Combining occasional in-person classes with home practice addresses both.