Final answer:
Lean Muscle Mass (LMM) is typically calculated by subtracting body fat percentage from total body mass. Body fat percentage can be estimated using skin-fold measurements or bioelectrical impedance, and these are used to improve BMR estimations. Muscle mass significantly impacts BMR as it burns more calories than body fat.
Step-by-step explanation:
To calculate Lean Muscle Mass (LMM) for the purpose of determining Basal Metabolic Rate (BMR), one would typically use bioelectrical impedance analysis or skin-fold measurements to estimate body fat percentage. Calculating LMM accurately would involve subtracting body fat percentage from total body mass. This process often involves the use of body fat calipers or electric impedance testers. The body fat percentage is crucial because a lower body fat percentage correlates with a higher BMR, especially evident in males who naturally have lower body fat and higher muscle mass compared to females.
The metabolic rate is influenced by factors such as age, sex, total body weight, and lean body mass. Specifically, muscle mass has a significant impact on BMR because it burns more calories than body fat. By understanding the amount of lean muscle mass a person has, one can better estimate BMR and the number of calories burned at rest, which is essential for creating personalized diet and exercise programs.
It is also important to note that building extra lean tissue through physical exercise can help raise the BMR. This means that not only will more calories be burned during physical activities, but also at rest.