Effects of Exercise on Chromium Levels
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It is estimated that most individuals are not ingesting sufficient amounts of chromium in their diets. Although there is little information on chromium intake in athletes, many athletes ingest more calories than do non-athletes so their chromium intake should be adequate. However, athletes who restrict calories to maintain low bodyweights could compromise their chromium status. Some evidence also shows that exercise may increase chromium loss into the urine. At present, it is not known whether this loss necessitates additional chromium in the diet or whether the body will increase retention in response to the loss. Chromium deficiency is thought to contribute to glucose intolerance and unhealthy blood lipid profiles. The primary function of chromium is to potentiate the effects of insulin, and thereby alter glucose, amino acid and fat metabolism. Chromium supplements have been purported to increase muscle mass and decrease body fat. However, the preponderance of evidence has not supported this claim. There is little information available on the long term use of chromium supplements, but at present, supplements within the Estimated Safe and Adequate Daily Dietary Allowance (ESADDI) level do not appear harmful. The prudent course of action for athletes would be to ingest foods rich in chromium and perhaps take a multivitamin/mineral supplement containing no more than the ESADDI of chromium.
KeywordsChromium Adis International Limited Chromium Picolinate Chromium Chloride Chromium Supplement
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- 5.Stoecker BJ. Chromium. In: Ziegler EE, Filer Jr LJ, editors. Present knowledge in nutrition. 7th ed. Washington, DC: International Life Sciences Institute, 1996: 344–53Google Scholar
- 6.Groff JL, Gropper SS, Hunt SM. Advanced Nutrition and Human Metabolism. Minneapolis/St Paul: West Publishing Co., 1995: 385–9Google Scholar
- 11.Gibson RS. Principles of nutritional assessment. New York: Oxford University Press, 1990; 513–20Google Scholar
- 19.Vinson JA, Bose P. The effect of high chromium yeast on the blood glucose control and blood lipids of normal and diabetic human subjects. Nutr Rep Int 1984; 30: 911–9Google Scholar
- 26.National Research Council. Recommended dietary allowances, 10th ed. Washington, DC: National Academy Press, 1989: 241–3Google Scholar
- 27.Anderson RA. Nutritional role of chromium in glucose and lipid metabolism of humans. In: Collery Ph, Poirier LA, Manfait M, editors. Metal ions in biology and medicine. Paris: John Libbey Eurotext, 1990: 95–9Google Scholar
- 31.Gatteschi L, Castellani W, Galvan P, et al. Effects of aerobic exercise on plasma chromium concentrations. In: Kies CV, Driskell JA, editors. Sports nutrition: minerals and electrolytes. Boca Raton (FL): CRC Press, 1995: 199–204Google Scholar
- 33.Anderson RA. New insights on the trace elements, chromium, copper and zinc, and exercise. Med Sport Sci 1991; 32: 38–58Google Scholar
- 38.Lefavi, RG. Response [letter]. Int J Sport Nutr 1993; 3: 120–2Google Scholar
- 40.Evans GW. The effect of chromium picolinate on insulin controlled parameters in humans. Int J Biosocial Med Res 1989; 11: 163–80Google Scholar
- 43.Clarkson PM. Nutritional ergogenic aids: chromium, exercise, and muscle mass. Int J Sport Nutr 1991; 3: 289–93Google Scholar