As someone mentioned, you’re probably going to get answers all over the map here. Haha.
I think that’s because this is among the questions that is still being, sort of, ‘sorted out’ right now?
So some people are identifying problems with yoga (e.g. involving beliefs about ‘chi’ and chakras, or about yoga achieving spiritual purposes that are explicitly framed in terms of a different religion, including some poses being designed to specifically express worship towards some specific Hindu deities (apparently)).
And some people are identifying theoretically harmless and adaptable elements of yoga (e.g. stretching, breath control, relaxation).
And the debate is mainly whether the one side’s position overwhelms the other. And that’s not decided yet.
I will say, a good and orthodox priest I know thinks the fuss about yoga is overblown, and I think he’s in the camp of thinking yoga can be harmless if it’s just stretching etc.
For myself, I personally think that yes, we should ‘baptize’ practices from other cultures and religions whenever possible – and at the same time I think we need to be very careful when we do so, because there may be more little changes necessary than we at first imagine (because little things, even unnoticed, can have a gradual effect on us over time). I haven’t personally looked into yoga enough to know what all the little things are that may need to be tweaked (e.g. especially regarding what one is told to visualize when doing each pose, including visualizing ‘energy’ moving within them or from them)… but especially because (apparently?) there’s also a risk that no matter what intent you have in doing a pose, others might interpret a specific pose as an expression of worship to a specific Hindu god that pose was designed for… other ‘stretching’ practices seem less problematic to begin with. E.g. Pilates. I know nuns who do pilates. Haha.