Yes an elliptical excercise machine burns more calories than a treadmill. With these machines, your entire body is in motion, thus burning more calories.
The only accurate way to know how many calories you burn on an elliptical machine is to undergo testing in a medical lab that measures the amount of oxygen you use while exercising. Since this is not feasible for most people, there are some online calculators that can give you a rough estimate. These calculators use your weight and exercise time to provide your calorie burn.
A 130-lb person burns 212.7 calories in 30 minutes exercising on an elliptical at a moderate intensity, while someone weighing 175 lbs. Burns 286.3 calories in the same amount of time.
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