As we age, lean body mass naturally decreases due to sarcopenia, a condition characterized by the loss of lean tissue, muscle mass, strength, and function. However, numerous studies have highlighted the potential of essential amino acid supplements to increase lean body mass, even in cases of insulin resistance when muscle-stimulating effects are diminished. In this article, we delve into the significance of lean body mass, its distinction from lean muscle mass, methods to assess lean body mass, and the role of amino acids in its development.
Lean body mass refers to the total mass of organs, bones, blood, skin, and muscles, excluding body fat. To calculate it, simply subtract your fat mass from your total body weight. On average, lean body mass constitutes approximately 60-90% of total body weight, with men typically having a higher percentage compared to women.
Although lean body mass is often used interchangeably with terms like lean mass or fat-free mass, it is important to note that they are not identical concepts. While lean body mass encompasses all organs and tissues, lean muscle mass specifically focuses on muscle size and composition.
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