Men who regularly do endurance exercise have 45% lower insulin levels after eating a meal than men with average fitness, even though their blood sugar levels rise similarly, suggesting their bodies...
Mechanism
Synthesis from 1 study
Endurance training helps the brain respond better to insulin after eating, which tells muscles to soak up sugar more efficiently without needing as much insulin. This lets the body keep blood sugar steady while producing far less insulin than someone who isn't trained.
Most probable mechanism
After eating, insulin crosses into the brain more efficiently in people who train endurance, where it activates specific nerve centers that tell muscles to take up more sugar without needing as much insulin. This means the body can control blood sugar with less insulin, even when the same amount of sugar is eaten.
Chronic endurance training increases the transport of insulin across the blood-brain barrier into the hypothalamus
Elevated insulin in the hypothalamus activates insulin receptors on neurons, triggering intracellular signaling through PI3K and MAPK pathways
Activated hypothalamic neurons increase efferent sympathetic nerve firing to skeletal muscle
Increased sympathetic nerve activity enhances glucose uptake in skeletal muscle through non-insulin-dependent mechanisms, such as increased blood flow and GLUT4 translocation
Improved muscle glucose disposal reduces the need for pancreatic insulin secretion to maintain normal blood glucose levels
Evidence from Studies
Supporting (1)
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Influence of endurance training on central sympathetic outflow to skeletal muscle in response to a mixed meal.
Contradicting (0)
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