Understanding Your Body Composition

You know your lean body mass

Lean body mass is everything in your body except fat — muscles, bones, organs, and water

Your LBM is within the expected range for your height and sex

Healthy LBM varies by height, sex, and age — knowing your range helps spot muscle loss early

You have tracked LBM changes over time

Monitoring trends matters more than a single snapshot — aim to preserve or increase LBM as you age

You know your body fat percentage

Body fat % is a more meaningful metric than weight alone for assessing health and fitness

Your body fat is within a healthy range

Generally 10-22% for men and 20-32% for women is considered healthy, though optimal ranges vary by age and goals

Your body fat is evenly distributed

Excess visceral (belly) fat is a stronger risk factor for disease than fat stored in the hips or thighs

You can see or feel muscle definition

Visible or palpable muscle tone indicates a favorable muscle-to-fat ratio

Your strength has increased over time

Getting stronger is one of the most reliable indicators that you are building or maintaining muscle mass

You can perform basic bodyweight exercises

Being able to do push-ups, squats, and planks demonstrates functional muscle fitness

You know your waist circumference

Measuring at the navel level gives a simple indicator of abdominal fat accumulation

Your waist-to-height ratio is under 0.5

Keeping your waist circumference less than half your height is linked to lower cardiovascular and metabolic risk