How long and how often should one practise?
The effect of the exercises is the more intensive the longer one practices (however without exhausting oneself completely). Beginners or sick people can start to practise with duration of 5-10 minutes. The practising period should little by little be extended to 35 minutes up to one hour or more. It is possible to practise three times a day. Basically it is sufficient to practise once a day, if this practising period is long enough.