metabolic rate measurement base metabolic rate measurement true quantification of an individual's base metabolic rate, the minimum amount of energy required to sustain life while at complete rest, including the body being in a post-absorptive state (ie the digestive system is inactive). BMR differs from RMR because BMR measurements must meet total physiological equilibrium whereas RMR conditions of measurement can be altered and defined by the contextual limitations. basal metabolic rate measurement Dani Welter BMR measurement