The rebutting-author makes a valid point, but he seems to entirely miss the point. Yes, the yoga piece is no different than a "How Running Can Wreck Your Knees" piece, but yoga is especially treasured because it's seen as a spiritual, theres-no-way-something-this-inner-peaceful-could-be-bad activity.

The danger is not just in the physical exertion, but the mindset of the practitioners and teachers.