When Hannah Montana sang, “put your arms to the sky, move side to side,” in Hoedown Throwdown, I like to think she was talking about side lunges. Chances are, you’ve done a few lunges in your ...

If you don’t feel as strong as you once did, it’s not surprising. Everyone loses muscle mass with age. Muscle weakness in the legs can make it difficult to get up from a chair, walk, or climb stairs.