Why does exercise-induced hyperthermia sometimes fail to trigger sufficient cutaneous vasodilation in elderly individuals compared to younger adults performing the same exercise at similar environmental conditions?

💡 Explanation

Age-related endothelial dysfunction reduces nitric oxide production, impairing vasodilation in response to heat stress because nitric oxide is a key vasodilator. Therefore, the elderly experience less cutaneous vasodilation. This is rather than reduced cardiac output or body fat directly limiting blood vessel response.

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