Energy balance
When energy balance is maintained, exercise does not induce negative fat balance in lean sedentary, obese sedentary, or lean endurance-trained individuals.
If you exercise but eat back the calories you burned, you will not lose fat. To lose fat through exercise, you must not replace the calories expended. Simply adding exercise without adjusting diet will not create a negative fat balance.
These data suggest that when exercise is performed with energy replacement (i.e., energy balance is maintained), 24-h fat oxidation does not increase and in fact, may be slightly decreased.
Why this rating
Randomized controlled trial using whole-room calorimetry, a gold-standard method for measuring energy expenditure and substrate oxidation, with rigorous control of energy balance.
Source
When energy balance is maintained, exercise does not induce negative fat balance in lean sedentary, obese sedentary, or lean endurance-trained individuals
Edward L. Melanson et al. · Journal of Applied Physiology · 2009
DOI 10.1152/japplphysiol.00958.2009
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