Summary
During the 100 km race in Biel, Switzerland, seven-well-trained men (age 33.3±3.5 years; \(\dot Vo_2 \) max. 59.9±ml/kg) have been investigated.
Their mean running time over the 100 km distance averaged 10.41±1.25 h. In contrast to almost unchanged blood glucose and lactate concentrations, blood lipids showed significant changes. Triglycerides decreased about two-fold, whereas glycerol and free fatty acids increased to extremely high concentrations (0.628 and 2.44 mmol/l respectively). Plasma insulin after the run was unaffected, whereas growth hormone, aldosterone and cortisol concentrations were significantly increased. With the exceptions of a still significantly elevated aldosterone and lactate concentration as well as a decreased triglyceride concentration all other values in the blood are restored to normal 24 h after completion of the run.
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Supported by Bundesinstitut für Sportwissenschaften, Köln
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Keul, J., Kohler, B., von Glutz, G. et al. Biochemical changes in a 100 km run: Carbohydrates, lipids, and hormones in serum. Europ. J. Appl. Physiol. 47, 181–189 (1981). https://doi.org/10.1007/BF00421670
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DOI: https://doi.org/10.1007/BF00421670