InvincibleStress is not in your head, it's in your heart this is the key to peak performance that Dr Leah Lagos, an internationally known expert in biofeedback and sport and performance psychology, wants us to know. In Invincible, she shares with readers for the first time the same programme that she uses with top athletes, CEOs, and business leaders anyone who wants and needs to perform at their best. What makes her scientifically proven ten week programme