Does exercise burn extra fat if you eat back the calories?
When energy balance is maintained, exercise does not induce negative fat balance in lean sedentary, obese sedentary, or lean endurance-trained individuals.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
Fat oxidation decreased on exercise days in all groups
Common belief is that exercise increases fat burning all day long, especially in trained individuals. This study shows the opposite when calories are replaced.
Practical Takeaways
If your goal is fat loss, focus on energy balance—don’t automatically 'eat back' the calories you burn during exercise.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
Fat oxidation decreased on exercise days in all groups
Common belief is that exercise increases fat burning all day long, especially in trained individuals. This study shows the opposite when calories are replaced.
Practical Takeaways
If your goal is fat loss, focus on energy balance—don’t automatically 'eat back' the calories you burn during exercise.
Publication
Journal
Journal of applied physiology
Year
2009
Authors
E. Melanson, W. Gozansky, D. Barry, P. MacLean, G. Grunwald, James O Hill
Related Content
Claims (6)
Even if you're a fit person who burns fat well, riding a bike for an hour at a moderate pace won't help you burn more fat over the next 24 hours if you're eating just enough to match what you burn.
Even if you exercise, your body won't burn more fat over the day if you eat back the calories you burned — it's more about whether you're in a calorie surplus, deficit, or balance than the workout itself.
If you exercise for an hour at a moderate pace but eat back all the calories you burned, you won’t burn more fat over the next 24 hours — whether you're lean, overweight, or a trained athlete.
If you exercise for an hour at a moderate pace but eat back all the calories you burned, you might still store more fat over the day — even if you're fit or at a healthy weight.
After eating, when adults go for a moderate workout, their bodies burn more carbs over the next 24 hours but don’t burn any more fat — meaning meals push the body to use carbs for energy instead of fat, even with exercise.