Fans of yoga therapy have yet to win over doctors

What convoluted logic. Simply because other forms of exercise also benefit the individual is no reason to sneer at the benefits of yoga for "failing to pass muster." That's equivalent to dismissing the benefits of eating spinach to overall health because kale or green vegetables in general offer similar benefits.

Certainly, some practices of yoga are steeped in mystical elements that might make some scientists squirm, but those who enjoy those trappings with their yoga don't come to any harm from chanting or burning incense. Those who prefer a more sporting style can find that. In India there is a militaristic style practiced in the army.

Yoga is good for flexibility, stretching, and helping to bring peace to your life. Someone expecting more than that sounds like the quacks who get diagnosed with cancer and decide to fly to South America and pay a ton of money for a "healer" to pull the cancer from your body using his fingers.