Lean Body Mass

Definition

A collective term for all tissues in the body except for fat, including skeletal muscles, organs, bones, bodily fluids, and connective tissues, representing about 60-75% of the total body weight.

How it works

Lean body mass is metabolically very active, unlike body fat. Muscles consume a lot of energy even at rest, meaning a person with a high lean body mass will burn more calories naturally.

Role

Performing primary metabolic functions, ensuring mobility, and producing energy at rest.

Examples

• An 80 kg man with 82% lean body mass has 65.6 kg of muscles
• An athlete with 75% lean body mass for high metabolism
• An older person gradually losing muscle mass

Recommendations

Consume enough protein (1.2-2g/kg body weight) and practice strength training or resistance exercises to maintain and develop your lean body mass. This improves your metabolism and quality of life.

Key takeaway

Developing and preserving lean body mass is essential for active metabolism and good health.

Related terms