Calculate FFMI to Assess Whether You Have Sufficient Muscle Mass

Use fat-free mass index from body composition data to determine whether muscle mass is sufficient for health. For men, target about 20 or higher, with below 17 indicating severe insufficiency; for women, target about 18 or higher, with below 15 indicating severe insufficiency. Interpretation assumes body fat is probably below 30% for men and below 35% for women.