
Dear Doctors: My body fat percentage has gone up quite a bit. I was surprised because I haven’t gained weight. I’m a 66-year-old woman, I walk at least a mile every day, and I play tennis. My doctor says I should start lifting weights, too. Can’t I just do longer walks?
Dear Reader: Though we rely on the bathroom scale to let us know if we’re edging up from a healthy weight, another metric of health and well-being is body fat percentage.