THE UPSHOT This is the age at which most people hang up their Metcons
– but you’re not most people. According to tests conducted on men with an average age of 54, a regular fitness programme can stave off “age-related” declines in energy and testosterone. But your greatest imperative? Protecting your brain. A study in the British
Journal of Sports Science found that raising your heart rate also improves thinking and memory. So, stop chasing PBS: high-rep training is the smartest way to keep your brain and body sharp.