I wrote my comments to caution everybody about Yoga. I believe it is essential that bible believing christians realize that there is nothing spiritiual that is good unless it comes from the bible. This means there is nothing, absolutely nothing good about yoga from the spiritual side. Yoga is a spiritual discipline of the Devil. Now for those that are prepared to throw out all of the spiritual side of yoga and keep the asanas alone, that means 100% westernized hatha yoga, that is fine. All I can say is that many, many teachers and students that are attracted to yoga like the oriental spiritual side of it, and every christian has to guard himself against that. Any yoga conference and pretty much every yoga book has satanic spiritual elements. And remember any spirit that is not from the bible is from Satan. We are to worship the Lord our God, and him only for he is a jealous god.
So to summarize my point is that a yoga devoid of all spiritual content, just asanas is in my opinion acceptable in the eyes of God. However, all eastern spiritual components of yoga are an abomination to the Lord.