Convict Conditioning, Volume 4: Advanced Bridging: Forging an Iron Spine
Erect twin pythons of coiled beef up your spine and develop extreme, explosive resilience, with the dynamic power and flexible strength of advanced bridging. teach you in absolute detail how to progress from the ease of a Short Bridge, to the stunning achievement of the Stand-to-Stand Bridge. Ten progressive steps guide you to inevitable mastery of this ultimate exercise for an unbreakable back.
