ASK THE DOCTORS
Dear Doctors: At my last checkup, it turned out my body fat percentage had gone up quite a bit. I was surprised because I had 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: Although we rely on the readings from the bathroom scale to let us know i…