Determining your body mass index What is body mass index? Body Mass Index, or BMI, is a tool that helps you know if you’re in a healthy range. Segmental Lean Analysis: -Evaluates whether the muscles are adequately developed in the body-Shows how much Lean Muscle Mass is in each segment of the body-Trunk includes the chest, abdomen, back, and lower back. It is useful as a rough guide, but it has limitations. Determining how much you should weigh is not a simple matter of looking at a height-weight chart, but includes considering the amount of bone, muscle and fat in your body's composition. The score is based on your leg muscle mass divided by your body weight. An important part of a man’s overall health is maintaining a healthy body weight. Refer to the chart to analyze your score. Muscle mass indicates the weight of muscle in your body. A score is given for your physical condition, and plotted against average healthy values for gender and age. June 12, 2016. Reviewed by UPMC. Fat mass is the opposite of lean body mass, which is made up of muscles, internal organs and bones. Men’s Body Mass Index Chart & A Healthy Men’s BMI. Muscle mass is composed of 3 types of muscles: skeletal, smooth, and cardiac muscle. The normal ranges for fat mass are as follows: Muscle mass. The amount of fat is the critical measurement. Body mass index (BMI) is a rough estimate of body fat percentage. The ratio of muscle mass in your legs to your total body weight. A healthy 20-25 year old should achieve a score of 100. Share this on: Updated June 22, 2020. For example, people with high muscle mass may have a …