But for a long time, I didn’t understand why so many women MBAs were signing up for yoga, pilates, and barre teacher training, and then radically changing their careers. I watched as their job ...

If you’re training for an marathon, the principle of specificity ... there’s nothing wrong with a bit of stretching if it feels good. I’m a yoga teacher and as you can see, I don’t push stretching on ...

She thinks the popularity of yoga means it's effectively a victim of its own success. "I don't think you're told very much when you're training as a teacher about physiology or anatomy," she says.

Kuperman is also a yoga instructor and director of yoga teacher training at the Baptist Power Yoga Institute in Bryn Mawr, Penn., and has been practicing yoga himself for the past 25 years ...