It is powerful to outline metabolic age with out first defining basal metabolic fee (or BMR). “Your basal metabolic fee is how a lot caloric vitality or vitality from energy you’ll want to preserve your physique functioning, together with the organs, digestion, muscle tissue, and every little thing else working over a interval of relaxation,” explains useful drugs physician Heather Moday, M.D. “For those who have been mendacity in mattress all day lengthy, it is what your physique would want or burn to be able to operate.” BMR is predicated in your gender, top, weight, lean muscle mass—and a variety of different elements. The upper your BMR, the higher your metabolic age.