Yoga and breath work tend to get filed under relaxation, and that undersells them. There are claims made about them shifting the chemistry involved in attention and impulse control, and about sleep, mood and blood sugar too. Some of that stands on firmer ground than the rest. The dependable core is that slow breathing measurably changes how the nervous system is running, and that is a physical effect rather than a mood.

Fixed settings guarantee that somebody in the room is working far too hard and somebody else is barely working at all. If you tend to go flat out and only notice afterwards, a class that cues by effort protects you from yourself. It is a fair thing to ask about before you sign up, and a decent instructor will not mind being asked.

Perfectionism and going too hard tend to travel together, and between them they produce most of the injuries and most of the quitting. If you are teaching, say this at the start, because people will not assume they are allowed to approximate. If you are practising, the useful question is whether you could do this again tomorrow, not whether it looked right today.

Irritability is part of depression, and it belongs to the mixed and elevated states of bipolar disorder too. Anger skills are still worth having, and on their own they will not do much if what is driving the anger is a mood that needs treating. The clue is usually timing: a temper that arrived with a whole change in sleep, energy and outlook is a different thing from one that has always been there.

Full muscle relaxation, working through the body group by group, takes about twenty minutes and is worth doing a handful of times. Once your body knows what that release feels like, the single hand version can call some of it back in seconds. Skipping the long version and expecting the short one to deliver is the usual reason people say it does nothing.

There is a difference between letting pressure out of the body and rehearsing the grievance. A walk, a swim, hard cleaning, prayer: all of that shifts the physical charge. Retelling the story with heat in your voice, even to a sympathetic friend, is mostly practising the anger one more time.

This is not getting it off your chest. The target is the surplus energy, so stairs, a brisk walk, or a hard ten minutes of almost anything will do the job. The moment you notice yourself rehearsing what you should have said, bring your attention back to your legs or your breathing. You want to come back tired and quiet, not sharpened.

Pacing the kitchen while you build the case against someone keeps the whole system revved. The same twenty minutes spent counting breaths or noticing your feet usually lands somewhere else entirely. If the argument will not leave your head, make the movement demanding enough that there is no room left for it.

One round is rarely enough to tell. Try a breath for a minute or two, stop, and check what shifted: the chest, the shoulders, how loud your thoughts are. If you are guiding someone else, leave the quiet for them to answer into rather than telling them what they should be feeling.

Most people are strong in one and shy of the other. If you always take charge, your body never gets to finish anything on its own. If you only ever surrender to it, you are at the mercy of whatever state you wake up in. Breath is where the second skill is easiest to practise, because you can pick a direction and check within a minute whether anything moved.