Endurance sport, sleep & recovery: WHOOP VP of Performance Kristen Holmes sits down with Nuun Hydration CEO Kevin Rutherford and Director of Product Development Vishal Patel. They discuss how we can all benefit from performance monitoring (5:15), what endurance exercise does to your body (7:44), sleep as a skill (10:07) and the 4 stages of sleep (11:21), working out too hard to fall asleep (12:47), how WHOOP determines recovery (19:31), results of exercising when you're tired (21:33), nutrition for recovery (23:42), why 8 hours sleep is an arbitrary number (29:56), how to wake up energized (33:43), avoiding negative stress with mindful breathing (34:02), sleep fasting (39:22), hydration and its effect on HRV (42:04), and what happens when you miss your natural window to go to sleep (47:06).