Cristiano Ronaldo's biological age revealed: Could he extend his career to 50?

In his 40s, Cristiano Ronaldo still refuses to conform to the aging stereotype of an elite athlete. Now, WHOOP, the fitness tech company that he's a brand ambassador for, recently ran some physiological assessments and revealed that Ronaldo's biological age is 28.9 years, which is more than ten years younger than his actual age. The discovery is astounding and has led to debates over how much longer he may play soccer.
What is biological age, and how was it measured?Chronological age can be thought of as your birthdate, as it has nothing to do with the status of the various systems in our body. This is called your biological age. WHOOP utilizes next-generation wearable sensors to track multiple physiological markers such as heart rate variability, sleep, and recovery. After the data syncs, WHOOP determines a user-specific biological age, which gives an understanding of his or her health and fitness level.


What this meant for Cristiano Ronaldo was astonishing. Even at 40 years old, his body has reached peak adult form, capable of bouncing back and repairing much like the late twenties. These figures further validate his punishing training regimen and regimen of living.
Cristiano Ronaldo's response to his biological age and future plansUpon learning of his biological age, Cristiano Ronaldo expressed disbelief, stating, "I can't believe it's so good. 28.9." Inspired by these results, he confidently announced he was going to play football at a professional level for 10 more years; maybe even until 50. No player is expected to pledge that many years at one club in this modern football era, where the average retirement age is mid-30s.

Cristiano Ronaldo's biological age is 28.9 years old! 🤯

[ WHOOP ] pic.twitter.com/cF6QuWkmCN

— TCR. (@TeamCRonaldo) May 20, 2025

The 36-year-old remains desperate to prolong his career, and while his ravenous fitness and physique certainly deserve credit, he is chasing the elusive after a second career, more savage than most. Through the health tracking that comes with his partnership with WHOOP, he not only receives key health insights but also pursues one of his main objectives: performance optimization and longevity.

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At this age, we could be witnessing the dawn of a new era, where wearable technology, combined with a targeted health-monitoring strategy, could enable sportsmen and women to extend their careers beyond current conventions. This just goes to show how the intersection of modern technology and hardcore discipline/drive can deliver results like this, even in the later years of your life: a true Ronaldo.