Do at any time of the day, especially in the afternoon and evening, you can do at night. Lesson https://www.julianalucky.com/post/10-awesome-birthday-party-ideas-for-4-year-old: in any comfortable position, sitting or even standing, practice for as long as there is time, regardless of other practices and meals (can be done on a full stomach, which is unique for yoga techniques). Variations with the belly: the same as in the Bhastrika card (3 options with different effects).
It is perfectly combined with the performance of asanas, especially power ones – it “helps” to hold difficult poses, for example, the “bar” loved by many and by me personally (Dandasana, variation). But, it is not necessary to apply this breath in inverted poses and lying down. Achieve an even overtone both on inhalation and exhalation. The sound should not be loud and vulgar. Such breathing should be heard only by you, and not by people at the other end of the yoga room.
The beneficial effect is not in the volume, but in the duration of exposure, if the breath tickles the back of the throat, there is a beneficial effect. In fact, if you breathe too loudly, you can “tear” your throat for a couple of days, this is useless. In the cold season, it is useful to add Simha-kriya to this technique – “lion’s breath” with the tongue hanging out and “A-A-A!”, These two techniques also work as a prevention of angina.