I think as beginners we should be careful not to just give in to ‘our desires’.
Just because our habitual mind cues say " i feel i have to do drink water" or “i feel i have to scratch my nose” does not mean ‘that is the best thing for us’.
Our mind plays constant tricks, and we should use our yoga practice as an opportunity to watch the mind.
In India for thousands of years, if a teacher asked one to do certain things, or not do certain things, one simply did them. There was a trust and respect that was slowly and gradually built up with the teacher, and by ‘turning over one’s mind to some extent’ to the teacher, and simply following the guidance and instructions, one at first saw the games the mind played… and the struggle the mind outs up… but in time, one saw a taming of the mind, a strengthening of the will power, and in time the aspirant after taming the mind sufficiently then turned to the inner guru instead of an external guru.
I know that this goes completely against our Western ideas and what we hold as ‘ideals’ where each person is autonomous, independent, a free thinker… and what each person thinks for themselves is almost sacred and ‘to be respected’ such as 'my body is a temple… i know what is right for my body… my mind tells me what is right for my body… so i should follow MY feelings/mind.
Whereas in other cultures, there is an awareness that firstly the mind needs to be trained. The Ego needs to be met, and gradually tamed, so that one can recognize what is in fact a habitual thought/
/feeling/habit and then go beyond that to identify with the observer… but not get ‘led by the mind’.
There are many many things within yoga that are not understood. Many practices, guidelines etc. that have been passed down through centuries, and the real reasons or multitude of reasons have been lost.
In India the teacher did not ‘explain why’, they simply explained the techniques and the how.
In general Indian people do not have this busy western mind which constantly asked ‘but why…’
Equally well, when we ingest food or liquid and stimulate our stomachs and manipuru chakra, we are activating pingala channel.
If we are hoping to awaken sushumna channel we should be trying to balance ida and pingala as much as possible, so not over stimulating one or the other.
Many will say that this should be kept just for sitting prananyama or meditation practice… but other traditions such as Satyananda yoga advise not drinking during asana practice also.
It is also one of the ‘habitual acts’ that we do, and it is useful to be in an atmosphere where we can ‘drop’ those acts.
We won’t die by not drinking water for one hour
I wish you well with your practice.
Best Wishes,
Dave