average muscle percentage
What is the average muscle mass? Muscle mass is important in maintaining a healthy body. Depending  on age and physical activity level, the average muscle mass  percentage lies between 38% and 54% for men a â¦ nd between 28% and 39%  for women.Answered. I don't know the average, but I am 26, and workout 4 times a week doing lots of cardio (an hour or more). I have 24% fat and 38% muscle. I think the average woman is 25- â¦ 30% muscle.