Cristiano Ronaldo has invested in WHOOP, a fitness tracker rapidly gaining popularity among leading athletes around the world, including England stars.
The WHOOP wristband is a screen-free device designed to monitor fitness, sleep quality and the body's rate of recovery in detail. Manchester United forward Matheus Cunha was recently spotted wearing one as he celebrated his winning goal against Roma. England stars Declan Rice and Jude Bellingham have also worn the device.
The Portuguese veteran became an investor and global brand ambassador in 2024, having previously used the device personally as an ordinary customer for more than two years. Basketball superstar LeBron James has also invested in the project alongside Ronaldo.
How the device works and what it tracks
The device records key biometric measures around the clock: heart rate, heart rate variability, skin temperature and blood oxygen levels. As the wristband itself has no screen, all analysis is transmitted to and displayed exclusively on a smartphone app.
The system's functions are divided into three main areas:
- Strain: measures the amount of physical stress placed on the body during the day.
- Recovery: a morning score based on overnight data helps determine whether an athlete is ready for a demanding training session or needs a lighter day.
- Sleep Coach: analyses sleep stages and recommends optimal times to go to bed and wake up.
Users can log more than 140 daily habits — from drinking alcohol and meditation to flying — and assess their effect on fitness. A waterproof battery pack allows the tracker to be charged while it is still on the wrist, without interrupting data collection.
According to The Sun, a WHOOP subscription costs between £169 and £349 a year, while basic plans will be temporarily reduced by £40 during the November discounts.
