The point is that there is a big difference between depleting the store of glycogen, which can reliably be refilled in about 2 hours and the body's disassembling half the muscle mass, which takes many months to build back up if you even can build it back up to the original mass (unlikely if you are old).
The point is that there is a big difference between depleting the store of glycogen, which can reliably be refilled in about 2 hours and the body's disassembling half the muscle mass, which takes many months to build back up if you even can build it back up to the original mass (unlikely if you are old).