Sweat and sodium losses in NCAA football players: A precursor to heat cramps?

International Journal of Sport Nutrition and Exercise Metabolism

Volumn 15, Issue 6, 2005, Pages 641-652

  Stofan, John R ^a   Zachwieja, Jeffrey J ^a   Horswill, Craig A ^a   Murray, Robert ^a   Anderson, Scott A ^b   Eichner, E Randy ^b  

^a GATORADE SPORTS SCIENCE INSTITUTE   (United States)

^b UNIVERSITY OF OKLAHOMA   (United States)

Author keywords

Cramping; Electrolytes; Fluids; Heat illness; Salt

Indexed keywords

POTASSIUM; SODIUM;

ADULT; ARTICLE; BODY WEIGHT; COHORT ANALYSIS; CONTROLLED STUDY; DEHYDRATION; FLUID INTAKE; FOOTBALL; HUMAN; MUSCLE CRAMP; SODIUM URINE LEVEL; SWEATING; TRAINING; WEIGHT CHANGE;

EID: 29844433393     PISSN: 1526484X     EISSN: 15432742     Source Type: Journal    
DOI: 10.1123/ijsnem.15.6.641     Document Type: Article

References (25)

1. Allsopp, A.J., R. Sutherland, P. Wood, and A. Wootons. The effect of sodium balance on sweat sodium secretion and plasma aldosterone concentration. Eur. J. Physiol. 78:516-521, 1998.
2. Armstrong, L.E., D.L. Costill, W.J. Fink, D. Bassett, and M. Hargreaves. Effects of dietary sodium on body and muscle potassium content during heat acclimation. Eur. J. Appl. Physiol. 54:391-397, 1985.
3. Bergeron, M.F. Heat cramps during tennis: a case report. Int. J. Sport Nutr. 6:62-68, 1996.
4. Bergeron, M.F. Heat cramps: fluid and electrolyte challenges during tennis in the heat. J. Sci. Med. Sport. 6:19-27, 2003.
5. Boisvert, P., K. Nakamura, S. Shimai, G.R. Brisson, and M. Tanaka. A modified, local sweat collector for warm and humid conditions. Eur. J. Appl. Physiol. Occup. Physiol. 66:547-551, 1993.
6. Brockbank, E.M. Miner's cramp. Br. Med. J. 12:65-66, 1929.
7. Cade, J.R., H. Free, A. DeQuesada, D. Shires, and L. Roby. Changes in body fluid composition and volume during vigorous exercise by athletes. J. Sports Med. 11:172-178, 1971.
8. Cohen, J. Statistical Power Analysis for the Behavioral Sciences. Mahwah, NJ: Lawrence Erlbaum Associates, pp. 8-40, 1988.
9. Eichner, E.R. Heat cramps: salt is simplest, most effective antidote. Sports Med. Digest. 21:88, 1999.
10. Fowkes-Godek, S., A.R. Bartolozzi, and M. Kelly. Changes in blood electrolytes and plasma volume in NFL football players during pre-season training. Med. Sci. Sports Exerc. 36:S49, 2004.
11. Hargreaves, M., T.O. Morgan, R. Snow, and M. Guerin. Exercise tolerance in the heat on low and normal salt intakes. Clin. Sci. 76:553-557, 1989.
12. Jacobson, B.H., J. Ransone, and P. Vardiman. Comparison of fluid weight loss between heat related illness episodes and non-episodes in football players. Int. Sports J. Winter:95-100, 2001.
13. Maughan, R.J. Exercise-induced muscle cramp: a prospective biochemical study in marathon runners. J. Sport Sci. 4:31-34, 1986.
14. McCord, C.P., and T.L. Ferenbaugh. Fatigue in soldiers due to chloride losses: replacement through the use of sodium chloride in drinking water. Milit. Surg. IXIX:608-614, 1931.
15. Montain, S.J., M.N. Sawka, and C.B. Wenger. Hyponatremia associated with exercise: risk factors and pathogenesis. Exerc. Sports Sci. Rev. 29:113-117, 2001.
16. Nicol, J. Exercise-associated muscle cramps in distance runners: The role of serum electrolytes both during and following an ultra-marathon and IEMG activity in the recovery phase post-cramps. Dissertation/thesis: University of Cape Town, South Africa, 1996.
17. Oswald, R.J.W. Saline drink in industrial fatigue. Lancet. 16:1369-1370, 1925.
18. Patterson, M.J., S.D. Galloway, and M.A. Nimmo. Effect of induced metabolic alkalosis on sweat composition in men. Acta Physiol. Scand. 174:41-46, 2002.
19. Schwellnus, M.P. Skeletal muscle cramps during exercise. Phys. Sportsmed. 27:109-115, 1999.
20. Shirreffs, S.M., and R.J. Maughan. Whole body sweat collection in humans: an improved method with preliminary data on electrolyte content. J. Appl. Physiol. 83:336-341, 1997.
21. Stofan, J.R., D. Niksich, C.A. Horswill, R. Martin, T. Bream, and R. Murray. Sweat and sodium losses in cramp-prone professional football players. Med. Sci. Sports Exerc. 33(5):S256, 2001.
22. Stofan, J.R., J.J. Zachwieja, C.A. Horswill, M.K. Horn, K. Osterberg, and R. Murray. Assessment of sweat electrolyte losses in humans during exercise: whole body versus regional measurement. FASEB J. 16:A1141, 2002.
23. Stone, M.B., J.E. Edwards, C.L. Stemmans, C.D. Ingersoll, R.M. Palmieri, and B.A. Krause. Certified athletic trainers' perceptions of exercise-associated muscle cramps. J. Sports Rehab. 12:333-342, 2003.
24. Talbott, J.H. Heat cramps. Medicine. 14(3):323-376, 1935.
25. Yoshida, T, T. Takanishi, S. Nakai, A. Yorimoto, and T. Morimoto. The critical level of water deficit causing a decrease in human exercise performance: a practical field study. Eur. J. Appl. Physiol. 87:529-534, 2002.