For decades, we have viewed ageing as an inevitable and largely irreversible decline in physical and mental performance. While it is true that physiological changes begin earlier than most people realise, longevity medicine shows that the rate at which we age is far more modifiable than we once believed.
From around our thirties, we naturally begin to lose muscle mass and strength, a process known as sarcopenia, which happens alongside gradual reductions in aerobic capacity, connective tissue elasticity and recovery speed. It is important to note that these changes don't occur overnight, and they aren't dictated by chronological age alone. Genetics plays a role, but lifestyle, training quality, nutrition, sleep, stress and recovery all have a significant influence on how quickly these changes develop. Research on masters athletes consistently shows that lifelong exercise can significantly slow many of the physiological declines associated with ageing, allowing individuals to maintain remarkably high levels of performance well into later life.
Athletes such as Serena Williams, Novak Djokovic, Lionel Messi and Cristiano Ronaldo haven't somehow escaped ageing. What they have done is slow many of its functional effects through decades of highly structured training, robust recovery strategies and constant adaptation. Most importantly, they have also evolved how they compete. As explosive speed inevitably declines, experience, tactical intelligence, decision-making and efficiency often improve, allowing elite athletes to remain world class despite physiological change.
One of the biggest shifts we see with age is in recovery rather than performance itself. Older muscles become less responsive to the signals that stimulate repair and growth after exercise, which means recovery takes longer and maintaining muscle requires more effort. This is precisely why resistance training becomes increasingly important with age. We have very strong evidence that progressive strength training can preserve muscle, improve function and reduce frailty, even when started later in life.
Nutrition is also increasingly important. Older adults often require higher quality protein distributed throughout the day to overcome anabolic resistance, where muscles become less sensitive to the normal stimulus of dietary protein. Combined with regular strength training, adequate protein intake is one of the most effective strategies we have for maintaining muscle health and physical resilience.
From a longevity perspective, we are also moving away from simply reacting to disease and towards measuring how well the body is ageing before problems arise. In my clinic, HUM2N, this might involve assessing body composition, measuring cardiovascular fitness through VO₂ max, and reviewing metabolic health, sleep quality, inflammatory markers and, where clinically appropriate, hormone status. These objective measures allow us to identify opportunities to improve healthspan, the years we spend living in good health, rather than simply lifespan.
There is also growing public interest in longevity therapies, from continuous glucose monitoring and personalised nutrition to emerging regenerative treatments. Some of these technologies are promising, while others are still awaiting stronger evidence. The fundamentals, however, remain remarkably consistent. Regular resistance exercise, cardiovascular fitness, high-quality sleep, optimal nutrition, a healthy body composition and effective stress management continue to deliver the greatest return on investment when it comes to slowing biological ageing.
What elite athletes demonstrate is not that ageing can be stopped, but that it can be managed well. They provide a blueprint showing that with the right training, recovery and medical support, people can continue to perform at an extraordinarily high level for far longer than we once thought possible.
The lesson for the rest of us isn't that we should aspire to compete like Cristiano Ronaldo at 40, but that many of the same principles can help us remain stronger, healthier and more independent well into later life.
