Christian using breathing techniques?

Hi all.

I was just wondering what the perspective on breathing techniques are . I know that meditation in the Hindu and Buddhist way is a no-go for us Christian’s but I was wondering if as Christian’s it would be okay to do things like box breathing and buteyko breathing and diaphragmatic breathing ? It’s purely for health benefits and is just to help calm my anxiety (coupled with prayer , reading scripture ofc) and for overall health as a fighter?

I was also wondering if it’s okay to just sit outside and breathe slowly and deeply and think about nothing for a few hours or so after praying my prayer rope or is this bordering on emptying the mind Hindu type meditation.

I’ve seen it help a lot with pelvic floor issues, nervous system regulation and overall mental health? Would this be okay?

Also just wondering what’s the Christian view on stretching and things like trauma release from the hips. Obviously yoga and stuff is a no go but I was wondering cos I do stretch after my workouts but not in a yoga Hindu way.

Sorry if this is an overly asked question.

Many thanks