Directly measuring body fat: "Some older women might be familiar with a DEXA test to assess for bone thinning or osteoporosis. That can also be ... clear how widely or quickly they could be ...

if I'm more leisurely with my runs (which I am), I'm not getting my heart rate up high enough to burn fat. It matters less that I can run a marathon than how fast I can go. The same thing goes for ...

Excess belly fat can also cause fat tissue to become denser, disrupting the normal function of fat in the body. Fat stores energy for later use, produces hormones, and regulates metabolism.