Hi, I'm Olivier, also known as Coach K. Ex-rugby player. Strength and Conditioning and Mobility Coach. I fixed my own broken back after years of contact, heavy lifting and sprinting. I tried stretching, rolling and generic physio. It lasted an hour. What worked was teaching my body to control range under load. That's the method behind the Bulletproof Body System. 10+ years in athletic development. Over 200 athletes coached across rugby, sprinting, combat sports and the gym.