Exertional fatigue alters cold-induced vasodilation.
Chronic fatigue, due to repeated strenuous physical exertion with insufficient recover, results in increased basal circulating norepinephrine and may reduce effect sensitivity to sympathetic stimulation. Thus, fatigue could alter vasomotor and skin temperature responses to cold. This was performed before and after five days of physically exhausting exercise. Fatigue resulted in more rapid cold-induced vasodilation. Leaner Ss also experienced more pronounced vasodilation with fatigue.