The Harvard Medical School newsletter says that as we get older:
"We lose muscle mass and bone density, so while we may weigh the same as we used to, or even less (and congratulate ourselves on being thin), we may actually be lugging around more fat tissue. So we need to keep an eye on our waist size, not just our weight, especially after about age 50. Waist size is a fairly accurate reflection of how much visceral fat we’ve accumulated in our abdomens. And visceral fat is the metabolically active form of fat that causes so much harm."
