How can exercise impact insulin sensitivity?

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Exercise positively impacts insulin sensitivity primarily by enhancing glucose utilization. When physical activity occurs, the body's muscles require more energy, which increases the uptake of glucose from the bloodstream into the muscle cells. This process is facilitated by the translocation of glucose transporters to the cell membrane, effectively lowering blood sugar levels and improving the body's overall insulin response. Enhanced glucose utilization through exercise helps to lower insulin resistance, thereby making insulin more effective at promoting glucose uptake.

While reducing body fat, increasing muscle mass, and improving flexibility can have positive effects on insulin sensitivity, it is the direct impact of exercise on glucose uptake that makes it particularly significant. For instance, the increase in muscle mass itself may lead to improved glucose storage and utilization over the long term, but the immediate effect during exercise is related to enhanced glucose utilization. Improving flexibility is beneficial for overall physical performance and can aid in exercise participation, but it does not have a direct effect on insulin sensitivity compared to the direct metabolic changes that occur during exercise.

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