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Researchers say they will have discovered why there's a natural loss of muscle within the legs as individuals age - which it's as a result of a loss of nerves.
In tests on 168 men, they found that nerves dominant the legs diminished by around half-hour by the age of seventy five.
This created muscles waste away, however in older fitter athletes there was a stronger likelihood of them being 'rescued' by nerves re-connecting.
The scientists printed their analysis within the Journal of Physiology.
As individuals become old, their leg muscles become smaller and weaker, resulting in issues with everyday movements like walking up stairs or obtaining out of a chair.
It is one thing that affects everybody eventually, however why it happens isn't totally understood.
Prof Jamie McPhee, from Manchester Metropolitan University, aforementioned young adults typically had 60-70,000 nerves dominant movement within the legs from the body part spine.
But his analysis showed this modified considerably in maturity.
"There was a dramatic loss of nerves dominant the muscles - a 30-60% loss - which implies they waste away," he said.
"The muscles ought to receive a correct signal from the systema nervosum to inform them to contract, thus we will move around."
The analysis team from Manchester Metropolitan University worked with researchers from the University of Waterloo, Ontario, and also the University of Manchester.
They checked out muscle tissue thoroughly victimization resonance imaging (MRI) and that they recorded the electrical activity passing through the muscle to estimate the numbers and also the size of living nerves.
The good news is that healthy muscles have a kind of protection: living nerves will channelize new branches to rescue muscles and stop them symptom.
This is additional seemingly to happen in match individuals with massive, healthy muscles, academic McPhee aforementioned.
Although it's not famed why connections between muscles and nerves break down with age, searching for additional concerning muscle loss may facilitate scientists realize ways in which of reversing the condition within the future.