Metabolism of Exercise States 100 meter sprint energy source used login to view 3 more bullets 100 meters to 1 kilometer energy source used login to view 1 more bullet 1 kilometer to a marathon energy source used login to view 2 more bullets Metabolism of Exercise States Absorptive state immediately after eating insulin in control login to view 12 more bullets Post-absorptive state between meals epinephrine/glucagon in control login to view 11 more bullets Starvation days 1-3 login to view 4 more bullets > 3 days login to view 4 more bullets > several weeks login to view 6 more bullets note: RBCs are always dependent on glucose