Calculates calories burned during an activity using MET values.
The MET-based calorie calculator estimates the energy burned during physical activity using the Metabolic Equivalent of Task (MET) value, body weight, and duration.
Calories burned = MET × Weight (kg) × Duration (hours) (1 MET = energy cost of sitting quietly = ~1 kcal/kg/hour)
Cycling at moderate pace (MET ≈ 8), 75 kg person, 45 minutes (0.75 h). Calories = 8 × 75 × 0.75 = 450 kcal.
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