Muscle mass is the amount of muscle tissue in the body, typically expressed as a percentage of total body weight. It is an important measure of health and fitness, and can be influenced by factors such as age, gender, activity level, and diet.
The ideal percentage of body mass that should be muscle varies depending on individual factors, but generally falls within the range of 50-75%. This range is supported by research that has shown that individuals with higher muscle mass have better overall health outcomes, including increased strength, mobility, and longevity.