I was told that you break down muscle fibers with resistance training and build the muscles back when you sleep (provided you have enough protein). What about fat burning? Do you burn fat while you work out? Sleep? I understand you lose weight when there is a calorie deficit but when does it actually happen?
In: Biology
You burn fat when you are expending energy after you run out of easy stores of energy, like daily caloric intake.
Your body spends more calories keeping you warm than it does moving or thinking, or anything else, keeping you warm is the main thing that burns calories, so things like swimming, or walking or hiking in colder weather will be some of the best fat burning exercise.
So in reality the fat burning starts when your body burns past its daily intake.
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