catron and renee from the fryeburg university sports institute a testing how the body utilizes energy how much energy do we take in and how do we expend it. the basal metabolic rate or d m r is the energy our bodies require just to maintain all basic functions during the course of one day. it works rather like one of the old type light bulbs energy it's taken in an expended light exercise increases b.m.r. it's a combination of many factors so each person has their own metabolic rate. when people go on slimming diets for many weeks the body loses weight but it also means that to starvation mode to manage the reduced energy available the basal metabolic rate falls but it stays low even when we start eating normally again that's why people put on weight faster after a diet it's called the yoyo effect so how can we lose weight permanently that's a question freiburg universities professor daniel kearney is seeking to unfair. we know that long term weight loss only functions when we also exercise exercise builds muscle mass and raises the basal metabolic rate and we also burn calories while