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 can only use glucose as a power source. When none is available, you use glucagon, which is a starchy polymer of sugars. Fat is basically carbs that have been converted into a more stable form of energy storage. When you need it, your body turns fat into glucose in a process called gluconeogenesis. This produces ketones as a byproduct, which is why some people follow the “keto diet”. Ketones aren’t very good for your brain, by the way, so be careful if you attempt keto.
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