, slowing performance. This decrease in capacity could amount to a loss of at least seven per cent in performance per decade. 30s Your metabolic rate slows by two per cent every decade after 20. That means that with each passing decade, you need to eat 100

of anaerobic metabolism – where the lungs cannot transport enough oxygen into the blood to keep up with the muscles' demands – that performance will be impaired.Brain gain Although the New Hampshire researchers asked their volunteers to complete more than 25

of knee health is the rate of metabolic activity in the bone, information found in a less commonly collected and altogether different type of imaging – a bone scan, which reveals the rate of cellular turnover in the bone. A knee’s bone alignment can look

-product of normal metabolism, and as a result they operate less efficiently. Adding insult to injury, levels of testosterone and growth hormones that aid recovery also fall with age, says exercise physiologist Jonathan Dugas, co-author of the blog Science of Sport

to let your heart rate return to normal and for your body to clear out any metabolic  waste created during your efforts," says Kastor.7. Don't worry if you ache a littleIf you ease into running, your post-run discomfort shouldn't be debilitating

deficiency to lose weight; when you are running your heightened metabolism enables you to eat more because you are using more energy, but if your intake exceeds your energy needs it will still be stored as fat, even if its 'good' food such as carbs etc. See

at ever decreasing intervals as marathon training progresses (every 8-9 minutes now, whereas it was every 12-13 minutes before I increased my training).Is this likely to be a function of a higher metabolic rate (due to greater training volume), my having