It's for each of us as Yoga practitioners, to listen intuitively to our body as we practice, this may mean we slow down or omit postures if we feel it is not helpful at this time for the body.
We call it ‘self pacing' - we feel for ourself how deeply to stretch and where to ease off in a posture to create openings without causing strain.
A stretch may feel intense but it should never hurt, during or after the practice. If it does, this is a sign that we have over played ‘our edge’ and need to pull back and move into the posture more slowly and consciously.
This is the art of opening the body up. It may be that some of the deeper variations of a posture are not for us right now and that’s ok, they may be useful later.