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
Your fat is being continually “burned” – the stored chemical energy being converted into usable physical energy to move your muscles. This process happens at various rates depending on your body’s current activity level, but it is never completely off.
The main waste products are CO2 and H2O. So a large part of the loss goes to wherever your water goes (sweat, urine, etc) – and another large part goes to breathing.
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