Dr. James Hewitt spent years teaching Fortune 500 companies and Formula One teams how to optimize performance—while ignoring his own advice. Then he found a lump in the shower. In this fascinating conversation, James shares how a late-30s cancer diagnosis forced him to confront a hard truth: he wasn’t superhuman. We dive deep into the science of human performance, from why heart rate variability matters more than sleep tracking to how your mindset about stress can fundamentally alter your physiology. You’ll discover why the “monk mode” mentality is flawed, how self-compassion beats perfectionism, why vacation research says 3-4 days works better than two weeks, and the 3P model that explains why high performers struggle to celebrate wins. Plus: why James speaks out loud in hotel rooms, his $15,000 watch collection paired with socks full of holes, and the Mount Rushmore of performance books you need to read.