.A The rate at which our bodies burn calories is determined by many factors, of which time and distance are only two. First the science bit: our basal metabolic requirement (BMR), the number of calories we require over 24 hours, is dependent on age, sex

, exercise physiologist and sports nutritionist, and triathlete, explains: "What is happening is your basal metabolic rate (BMR) is decreasing. Your BMR is the amount of energy you need for your body operate normally if you were not to move and just stay

physiologist and sports nutritionist, and triathlete, explains: “What is happening is your basal metabolic rate (BMR) is decreasing. Your BMR is the amount of energy you need for your body operate normally if you were not to move and just stay in bed breathing

your metabolic rate comes into play. We burn calories in two ways: through our Basal Metabolic Rate (BMR, the rate we use calories to power our organs) and physical activity. To maintain a steady weight, calories consumed must equal calories burned (BMR