METABOLIC RESPONSES TO A 90 KM RUNNING RACE

  • 1 January 1982
    • journal article
    • research article
    • Vol. 61  (13) , 482-484
Abstract
Serum osmolality and serum Na, K, glucose, free fatty acid, glycerol, lactate, pyruvate, triglyceride, insulin and growth hormone levels were measured in 40 male athletes immediately after they completed the 90 km Comrades Marathon. Results were compared to control values measured at the same time of day in the same subjects 6 wk later. When compared to control values, serum Na glucose, free fatty acid, glycerol, lactate, pyruvate and growth hormone levels were all significantly elevated after the race. Serum insulin levels were reduced; serum K and triglyceride levels were unchanged. These results, which are essentially similar to those reported in shorter (42 km) and longer (160 km) distance races, provide important field data complementing those collected in the laboratory. Apparently, the overall metabolic response to marathon and ultramarathon running is not substantially different.

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