During the course of Yoga Journey, I was able to go inside myself more deeply than I've been able to during a solitary bike ride or a single yoga class. I've never experienced so intensely the feeling of pushing my heart to its limit, then consciously slowing it down.
Perhaps that's the draw of both disciplines: The inner experience is always unique and revelatory. "In yoga the asanas don't change, yet each time you practice, you have a different experience with them," says McGee. "It's the same thing in Spinning: A flat ride is always a flat ride, but you never have the same ride twice."
Dimity McDowell is a Brooklyn, New York-based freelance writer.