Muscle weighs more than fat, for instance, and women and men who are very muscular and physically fit can have high BMIs without added health risks
. Because of that, waist circumference is also a useful tool to assess abdominal fat. In general, men are considered overweight if their waist measurement is greater than 40 inches. And women, in general, are overweight if their waist measurement is greater than 35 inches.
Even small reductions in weight can be beneficial.