Muscle strength is crucial for good health, particularly as you get older. But muscle naturally deteriorates with age, and as people in the U.S. live longer, doctors are increasingly aware of issues ...

If you've ever taken a few weeks – or even a few months – away from the gym, you've probably had the same thought: I've lost everything. 'I'm not as strong as I was.' 'I feel softer.' 'I'm back to ...