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Whoop
A wearable that measures recovery, strain, sleep, and heart rate variability around the clock so you can train smarter and recover harder.
Whoop 4.0
Whoop is a screen-free fitness tracker that continuously monitors strain, recovery, sleep, and heart rate variability. It turns raw biometric data into simple, actionable scores that help you decide when to push and when to rest.
I wear mine every day. It is the single best tool I have found for understanding how training, sleep, travel, and stress actually affect my body.
Get Whoop on AmazonWhy Whoop works
Whoop does not count steps or buzz you with notifications. It is built for one thing: understanding how hard your body is working and how well it is recovering. By tracking HRV, resting heart rate, sleep, and strain continuously, it gives you a daily recovery score that helps you train smarter and avoid burnout.
- 24/7 heart rate, HRV, and respiratory-rate tracking
- Recovery scores that tell you how hard you can train each day
- Detailed sleep breakdown with time in bed and restorative stages
- Strain score that measures cardiovascular load from workouts and life
- No screen, no distractions — just data and a simple app