Calories burned during exercise depend on the activity's intensity, your body weight and how long you do it. This uses MET values — a standard measure of how hard an activity is compared with resting — to estimate the burn. Heavier people and higher-intensity activities burn more. Treat it as a reasonable estimate rather than an exact figure.
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Fitness tracker
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Heart rate monitor
Measure real effort.
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Frequently asked questions
What is a MET?
A MET is a metabolic equivalent — how much energy an activity uses compared with sitting still. Running at about 9.8 METs burns far more than walking at 3.5 METs.
Why do figures differ between apps?
Different tools use different MET tables and assumptions. Fitness, efficiency and terrain all change the real number, so use any estimate as a guide.