If you do not meet the requirements view Secondary Evidence of US Citizenship. To order a Certified Copy of your birth certificate, click here. If you have ever had a US Passport and currently do not have proof of US citizenship, please request for a file search. Click here to request for a file search.
Lean Muscle Mass. Lean muscle is a concept related to lean body mass, which is the content of the body minus fat. Lean body mass is used to calculate basal metabolic rate.Lean muscle is less of a scientific term and more a term of art that refers to muscle that is independent of, and not obscured by, fat.ean Muscle Mass. Lean muscle is a concept related to lean body mass, which is the content of the body minus fat. Lean body mass is used to calculate basal metabolic rate.
Lean mass is superior to fat mass and should be maintained through healthy food choices and regular exercise. You can improve body composition losing fat, increasing lean muscle or a combination of both. For example, weight training adds both muscle mass and bone density.