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Anonymous
>>207521 Depends. If you are doing something strenuous while it is still in the bloodstream, you'll use it directly. Since it is a simple carb, it tends be dumped into the bloodstream all at once and needs to be used *right* then. Some maltodextrin and dextrose, for example, are very high GI carbs--but great for post-workout because your muscles are depleted of glycogen and you could use an insulin spike along with a good protein shake. If eaten any other time, they'd enter the bloodstream just as quick, but would not be needed while sitting at a computer. They'd be stored as fat after 40 mins. Once you store energy as fat, it becomes much harder to retrieve the energy without simultaneously catabolizing muscle, since fat and muscle are often burned together--the body has only so many ketones burning fat at one time and will look for proteins in absence of carbs--carbs which are not there because you chose a fast-digesting carb source rather than a slow hours-long source. Complex low GI carbs like oatmeal and wholegrains slowly enter the bloodstream and thus supply energy for several hours.
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