David Garrigues has been practicing Hatha Yoga, specializing in advanced Ashtanga Vinyasa for about 30 years. Few people understand the rigors and challenges of long-term asanas practices as deeply.

As a fellow vinyasa enthusiast, and keen meditator, I've long been fascinated by the overlap between the two and how much asana practice can be considered a meditation in and of itself -- and not just a preparation.

In our discussion, we look closely at the integration between medieval Hatha Yoga and its modern forms, how long-term practice challenges your faith, and the struggle between defining, and leaving things unsaid.

Check out David's new book: Ashtanga Yoga Vinyasa here