As an older man teaching in a gym setting I don’t think that yoga should be considered as an “exercise” class. There are much better cardio formats and better strength building activities. Yoga should be what it is, a centering practice that brings the mind, body, sprirt together. My classes are always focused on feeling good in you body–“digesting” the work they did in the other fitness activities. What good is a buff body or a yoga butt if you are miserable nervous wreck? I teach all of the classical ideas but leave out most of the sandkrit and Vedic terms. It works for me.