Nicola
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Exercise and Insulindoes exercise help get insulin in check quicker?
The popular press likes to believe it does, but it really doesn't. Insulin regulates lipoprotein lipase or LPL activity both in fat tissue and muscle tissue. During exercise, insulin will speed up the LPL activity in muscle tissue so that more fatty acids will be available to power the activity. At the same time, it decreases LPL activity in fat tissue, so there is no competition with the muscles.
Once exercise is complete, then insulin will decrease LPL activity in the muscles but INCREASE it in fat tissue and this will reclaim any fatty acids lost to exercise. This is the reason that exercise makes us hungry for the most part. Granted, if you were pretty full before you went, exercise may not make you hungry if you haven't created a deficit of fatty acids in fat tissue.
Exercise is kind of like a shell game. The fatty acids get moved around to support the activity in your body. Sure, fatty acids get burned for fuel, but it's not necessarily a direct correlation between burning fatty acids and how much you eat. It's more like burning fatty acids vis a vis how much is in the circulation. The fatty acids present in circulation are based on many days of eating, not just the last meal.
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