Understanding Calories Burned
How Calories Burned Are Calculated
Calories burned during exercise are estimated using MET (Metabolic Equivalent of Task) values, which represent the energy cost of physical activities. One MET is defined as the energy it takes to sit quietly (about 1 calorie per kg per hour). Moderate activities typically range from 3-6 METs, while vigorous activities can be 6+ METs. The calculation considers your weight, activity duration, and intensity level.
Factors Affecting Calories Burned
- Body Weight: More weight = more calories burned
- Activity Intensity: Higher intensity burns more calories
- Duration: Longer activities burn more calories
- Fitness Level: Fit individuals may burn fewer calories for same activity
- Body Composition: Muscle burns more calories than fat
Common Activity MET Values
- Walking (3 mph): 3.5 METs
- Running (6 mph): 10 METs
- Cycling (12-14 mph): 8 METs
- Swimming (moderate): 6 METs
- Weightlifting: 3-6 METs
Accuracy Note
These calculations provide estimates based on averages. Actual calories burned may vary by 10-20% due to individual factors like metabolism, fitness level, body composition, and exercise efficiency. For most people, these estimates are sufficiently accurate for tracking purposes.