Whoop is a fitness wearable that delivers 24/7 monitoring of sleep, strain, recovery, stress, and heart health from a screen-free wristband, helping athletes and health-focused adults turn continuous biometrics into training and recovery decisions. Designed for endurance athletes, lifters, and longevity-minded professionals, Whoop combines a Healthspan metric that tracks biological age and pace of aging, on-demand ECG and AFib detection on the premium tier, and apparel and band options like LeatherLuxe, Sport, Flex, and KnitWear for all-day wear. New members can try Whoop with a one-month Peak trial on a certified pre-owned device. Whoop is a strong fit for fitness YouTubers and longevity podcasters reviewing recovery wearables.