Lean tissue意思

"Lean tissue" is a term often used in nutrition, health, and body composition contexts to refer to the non-fat tissues in the body. It primarily includes muscle mass, but can also encompass other non-fat tissues such as organs, bone, connective tissue, and skin. The term "lean" is used to indicate that it excludes body fat.

In the context of body composition analysis, measuring lean tissue is important because it is metabolically active and contributes to the body's overall strength, metabolism, and physical function. A higher percentage of lean tissue is generally associated with better health outcomes, including improved metabolic health, strength, and disease resistance.

Lean tissue mass can be measured using various methods, including bioelectrical impedance analysis (BIA), dual-energy X-ray absorptiometry (DXA), magnetic resonance imaging (MRI), and computed tomography (CT) scans. These methods help to determine the amount of lean tissue relative to total body weight, which is expressed as a percentage.

Monitoring changes in lean tissue mass can be useful for athletes, bodybuilders, and individuals looking to optimize their body composition for health or performance reasons. It can also be a critical factor in the assessment and management of various health conditions, such as obesity, sarcopenia (age-related muscle loss), and cachexia (wasting syndrome).