T
I believe God has ownership of our body and any physical excercises therein. I don't practise yoga but I think the dangers are in the spiritual side of things - trying to be your own God by emptying your mind of everything. As Christians our form of meditation is different, we are to focus purely on our Triune God and his Kingdom. One opens you to spiritual attack, the other protects against it. I believe you can do the physical side of yoga but you'd have to be discerning and prayerful. Same idea applies to marital arts.