Though the roots of yoga may be in Hinduism, today its link with religion is blurry. Erik Davis says the yoga we practice today is a modern American creation, not an ancient path that's been handed down for centuries. "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.