I do an awful lot of running on both hard surfaces and turf. In the past, I would experience muscle strains and lower back discomfort from all the mileage. Since I began yoga, I have had no significant injuries or joint stress. I attribute it partly to adding yoga as a systematic method of stretching and flexibility training. If you strength train or power lift, I highly recommend adding yoga to your rest day routine.

Oh, BTW - There are tons of routines available on-line for no charge. Unfortunately, you don't get to hang out in a class full of sweaty, wide-bottom hippie moms...