exercise in aged

Aging can be associated with a loss of muscle mass and functional deficits. Recent research finds that while testosterone can help older men gain muscle, just adding more protein to the diet does not. Thus, there doesn't seem to be a reason to change protein requirements for seniors.
That physical activity can benefit health should come as no surprise; but it s not always clear how much is enough (or too much), and if the rules apply to older folks as much as to younger people. Two studies just published in JAMA Internal Medicine investigated these questions.