correlation), up to a maximum heart rate of 200 beats per minute, to enable users with above average maximum heart rates, and those exercising at high intensity levels, to make use of the calculator. The calculator does, however, provide an estimate of heart rate based calorie burn above the test data upper limit of 80% of VO2max (or roughly 89% of maximum heart rate according to the Swain et al. correlation) because the relationship between heart rate and calorie burn is not considered to be reliable below the test data lower limit. The calculator will not provide an estimate of heart rate based calorie burn below 41% of VO2max (or roughly 64% of maximum heart rate according to the Swain et al. The experimental data on which this calculator is based covers an exercise intensity level that ranges from between 41% to 80% of VO2max. These calculators re based on the formulas (shown below) derived by LR Keytel, JH Goedecke, TD Noakes, H Hiiloskorpi, R Laukkanen, L van der Merwe, and EV Lambert for their study titled "Prediction of energy expenditure from heart rate monitoring during submaximal exercise." Essentially, with increased exercise intensity your muscles must burn more calories, and so your heart must beat faster to provide the oxygen necessary to convert those calories to the form of energy that can be burned by your muscles. It is this relationship that allows you to predict your energy expenditure (i.e. The conversion of calories from their stored nutrient state to the form that can be burned by your muscle cells is achieved, during aerobic exercise, through the process of cellular respiration, which requires oxygen, and the delivery of oxygen through your bloodstream to your active muscle cells is directly related to your heart rate. About These CalculatorsÄuring exercise your muscles must burn calories to fuel their contractions. If you want to learn more about net and gross calorie burn, read the Net Versus Gross Calorie Burn article. If you want to convert the estimate to net calorie burn, memorize the number and click here. Note: This calculator provides gross calorie burn estimates. Fat Versus Carbohydrate Utilization During Exercise Calculator. ![]()
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