As an acupuncturist and bodyworker, I see plenty of sports/training injuries. Also after years of strength training and martial arts, I've accumulated a few injuries of my own. Leary of most systems and and their promises, this may be one of the best resources for working on oneself. Joint mobility exercises under the load of bodyweight and gravity is very similar in theory to somatic methods such as "Bones For Life". Strength and mobility cultivated via adaptive practices is intelligent and not so commonly seen. My initial experience with the wrist mobility exercise was like a shot of energetic "WD-40" which reached my shoulder within minutes. Ditch your yoga and stretching media and give this at try!