Though yoga may be rooted in Hinduism, its popularity as a fitness trend has blurred religious lines. Erik Davis says the yoga we practice today is a modern American creation, not an ancient path to enlightenment. "Sometimes it's very religious, and you have gods and you have chanting," he says. "And sometimes it's very secular. You have Jane Fonda in Spandex doing yoga on VHS tapes." From December 2013.