. There may still be little neck fat, but most men gain weight in their stomachs first. There's no separation of muscles and veins typically don't show. A male of 0'00". Some men have thicker abs then others and their abs may show through the skin at higher body fat levels. Same goes for women, some women hold fat in areas. In fitness assessment, muscle mass is regarded as a significant indicator of overall physical strength. Men tend to have approximately 00 percent muscle mass,. 