"Christian" Yoga?

I have been participating in a blog about Christian Yoga. The blog is a watchdog site, for the Christian watchdogs like CRN in my blog role. I have to say it has been a learning experience to read the folks from the Emergent and Fundamental side on this issue. I lean towards not practicing "Christian" Yoga because it mixes too close to paganistic Yoga. If one wants to do the physical exercises there is nothing wrong with it. Why add the spiritual to it? We don't do that with other exercises, like walking or jogging? You can do the physical, take the spiritual out of it so that you are not mixing up the crisp line between Christianity and other religions.