基础教程-介绍部分-11

One should not begin to practise when one is totally exhausted, feeling breathless or having been in strong sunlight Similarly, one should not practise immediately after doing any other physical exercises such as gymnastics, athletics, swimming etc. There should be a time gap for recovery. Or, one has to choose only the asanas, which bring recovery.

Do not hold the breath while doing any of the asanas. Breathe normally. Always inhale or exhale through the nose. Inhale or exhale where it is specified. Concentrate more on the performance of the correct posture rather than the breath. The particulars of breathing become known only when one is property established in the asanas. If the asana is correct, the breath moves properly.