Can diet and exercise prevent muscle loss in old age? Maybe not

Between the ages of 40 and 80, an estimated 30 to 50 per cent of muscle mass is lost, resulting in lower strength and less ability to carry out everyday tasks. This process — known as sarcopenia — is common and clearly linked to frailty and poorer health in older people. Although some studies find diet can enhance the effects of exercise to prevent muscle loss in later life, current evidence about what works is inconsistent, new research shows.

from Fitness News — ScienceDaily
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