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Micronutrients: interaction between physical activity, intakes and requirements

Published online by Cambridge University Press:  02 January 2007

Mikael Fogelholm
Mikael Fogelholm*
Affiliation:
University of Helsinki, Lahti Research and Training Centre, Saimaankatu 11, 15140 Lahti, Finland.
*
*Corresponding author: Email: [email protected]
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Abstract

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The present literature review examines the following questions: (a) What is the evidence that micronutrient requirements are increased in physically active people? (b) Is there an association between physical activity and micronutrient intake? (c) Are there any significant differences between indices of micronutrient status between physically active and inactive people? The available data suggest that micronutrient requirements are increased in physically active people because of increased losses through sweat, urine and faeces, and an increased need for defence against free radicals. However the evidence is controversial, and it is not possible to make any quantitative estimations. Micronutrient requirements in moderately active people are not likely to be very much above the levels recommended for the general population. The intake of micronutrients increases with increasing energy intake. Therefore, physically highly active people (athletes) have higher micronutrient intakes than untrained subjects. However, moderate physical activity does not necessarily affect daily micronutrient intake. The available indices of micronutrient status do not support the belief that micronutrient status is compromised in highly trained athletes, even without use of dietary supplements. Hence, there are no reasons to believe that the situation would be different in people who are only moderately active. The results suggest that micronutrient status is adequate for health and functional performance in physically active people who follow a normal, mixed Western diet.

Keywords

DietVitaminsMineralsTrace elementsNutritional statusExercise
Type
Research Article
Information
Public Health Nutrition , Volume 2 , Supplement 3a , March 1999 , pp. 349 - 356
Copyright
Copyright © CABI Publishing 1999

References

1Solomons, NW, Allen, LH. The functional assessment of nutritional status: principles, practise and potential. Nutr. Rev. 1983; 41: 33–50.CrossRefGoogle Scholar
2Williams, M. Nutritional ergogenic aids and performance. In: Harries, M, Williams, C, Stanish, WD, Micheli, LJ, eds. Oxford Textbook of Sports Medicine. Oxford: Oxford University Press, second edition, 1998: 126–38.Google Scholar
3Padh, H. Vitamin C: Newer insights into its biochemical functions. Nutr. Rev. 1991; 49: 65–70.CrossRefGoogle ScholarPubMed
4Dekkers, JC, van Doornen, LJP, Kemper, HCG. The role of antioxidant vitamins and enzymes in the prevention of exercise-induced muscle damage. Sports Med. 1996; 21: 213–38.CrossRefGoogle ScholarPubMed
5Vollestadt, NK, Sejersted, OM. Biochemical correlates of fatigue. Eur. J. Appl. Physiol. 1988; 57: 336–47.CrossRefGoogle Scholar
6Sobal, J, Marquart, LF. Vitamin/mineral supplement use among athletes: A review of the literature. Int. J. Sport Nutr. 1994; 4: 320–34.CrossRefGoogle ScholarPubMed
7van der Beek, EJ. Vitamin supplementation and physical exercise performance. J. Sports Sci. 1991; 9: 77–89.CrossRefGoogle ScholarPubMed
8Sauberlich, HE, Herman, YF, Stevens, CO, Herman, RH. Thiamin requirement of the adult human. Am. J. Clin. Nutr. 1979; 32: 2237–48.CrossRefGoogle ScholarPubMed
9Caster, WO, Mickelsen, O. Effect of diet and stress on the thiamin and pyramin excretion of normal young men maintained on controlled intakes of thiamin. Nutr. Res. 1991; 11: 549–58.CrossRefGoogle Scholar
10Brotherhood, JR. Nutrition and sports performance. Sports Med. 1984; 1: 350–89.CrossRefGoogle ScholarPubMed
11Beller, GA, Maher, JT, Hartley, LH, Bass, DE, Wacker, WEC. Changes in serum and sweat magnesium levels during work in the heat. Aviat. Space Environm. Med. 1975; 46: 709–12.Google ScholarPubMed
12Costill, DL, Coté, R, Fink, W. Muscle water and electrolytes following varied levels of dehydration in man. J. Appl. Physiol. 1976; 40: 6–11.CrossRefGoogle ScholarPubMed
13Costill, DL, Coté, R, Fink, WJ. Dietary potassium and heavy exercise: effects on muscle water and electrolytes. Am. J. Clin. Nutr. 1982; 36: 266–75.CrossRefGoogle Scholar
14Verde, T, Shephard, RJ, Corey, P, Moore, R. Sweat composition in exercise and in heat. J. Appl. Physiol. 1982; 53: 1540–5.CrossRefGoogle ScholarPubMed
15Armstrong, LE, Hubbard, RW, Szlyk, PC, Matthew, WT, Sils, IV. Voluntary dehydration and electrolyte losses during prolonged exercise in the heat. Aviat. Space Environ. Med. 1985; 56: 765–70.Google ScholarPubMed
16Hargreaves, M, Morgan, TO, Snow, R, Guerin, M. Exercise tolerance in the heat on low and normal salt intakes. Clin. Sci. 1989; 76: 553–7.CrossRefGoogle ScholarPubMed
17Wenk, C, Steiner, G, Kunz, P. Evaluation of the losses of water and minerals: description of the method with the example of a 10 000 m race. Int. J. Vit. Nutr. Res. 1989; 59: 425.Google ScholarPubMed
18Paulev, P-E, Jordal, R, Standberg, Pedersen N. Dermal excretion of iron in intensely training athletes. Clin. Chim. Acta 1983; 127: 19–27.CrossRefGoogle ScholarPubMed
19Gutteridge, JMC, Rowley, DA, Halliwell, B, Cooper, DF, Heeley, DM. Copper and iron complexes catalytic for oxygen radical reactions in sweat from human athletes. Clin. Chim. Acta. 1985; 145: 267–74.CrossRefGoogle ScholarPubMed
20Lamanca, JJ, Haymes, EM, Daly, JA, Moffat, RJ, Waller, MF. Sweat iron loss of male and female runners during exercise. Int. J. Sports Med. 1987; 9: 52–5.CrossRefGoogle Scholar
21Aruoma, OI, Reilly, T, MacLaren, D, Halliwell, B. Iron, copper and zinc concentrations in human sweat and plasma: the effects of exercise. Clin. Chim. Acta. 1988; 177: 81–8.CrossRefGoogle Scholar
22Nickerson, HJ, Holubets, MC, Weiler, BR, Haas, RG, Schwartz, S, Ellefson, ME. Causes of iron deficiency in adolescent athletes. J. Pediatr. 1989; 114: 657–63.CrossRefGoogle ScholarPubMed
23Seiler, D, Nagel, D, Franz, H, Hellstern, P, Leitzman, C, Jung, K. Effects of long-distance running on iron metabolism and hematological parameters. Int. J. Sports Med. 1989; 10: 357–62.CrossRefGoogle ScholarPubMed
24 Anonymous. Recommended daily amounts of vitamins & minerals in Europe. Nutr. Abstr. Rev. (Series A) 1990; 60: 827–42.Google Scholar
25 Nordic Nutrition Recommendations. Nordisk Ministerråd. Rapport 1989:2. Uppsala: Statens Livsmedelsverk, 1989.Google Scholar
26Brune, M, Magnusson, B, Persson, H, Hallberg, L. Iron losses in sweat. Am. J. Clin. Nutr. 1986; 43: 438–43.CrossRefGoogle ScholarPubMed
27Deuster, PA, Dolev, E, Kyle, SB, Anderson, RA, Schoomaker, EB. Magnesium homeostasis during high-intensity aerobic exercise in men. J. Appl. Physiol. 1987; 62: 545–50.CrossRefGoogle ScholarPubMed
28Singh, A, Deuster, PA, Day, BA, Moser-Veillon, PB. Dietary intakes and biochemical markers of selected minerals: comparison of highly trained runners and untrained women. J. Am. Coll. Nutr. 1990; 9: 65–75.CrossRefGoogle ScholarPubMed
29Lichton, IJ, Miyamura, JB, McNutt, SW. Nutritional evaluation of soldiers subsisting on meal, ready-to-eat operational rations for an extended period: body measurements, hydration, and blood nutrients. Am. J. Clin. Nutr. 1988; 48: 30–7.CrossRefGoogle ScholarPubMed
30Deuster, PA, Day, BA, Singh, A, Douglass, L, Moser-Veillon, PB. Zinc status of highly trained women runners and untrained women. Am. J. Clin. Nut.r 1989; 49: 1295–301.CrossRefGoogle ScholarPubMed
31Halvorsen, FA, Lyng, J, Ritland, S. Gastrointestinal bleeding in marathon runners. Scand. J. Gastroenterol. 1986; 21: 493–7.CrossRefGoogle ScholarPubMed
32Baska, RS, Moses, FM, Graeber, G, Kearney, G. Gastrointestinal bleeding during an ultramarathon. Digest. Diseases Sci. 1990; 35: 276–9.CrossRefGoogle ScholarPubMed
33Lampe, JW, Slavin, JL, Apple, FS. Iron status of active women and the effect of running a marathon on bowel function and gastrointestinal blood loss. Int. J. Sports Med. 1991; 12: 173–9.CrossRefGoogle Scholar
34Rudzki, SJ, Hazard, H, Collison, D. Gastrointestinal blood loss in triathletes: it's etiology and relationship to sports anaemia. Austr. J. Sci. Med. Sports 1995; 27: 3–8.Google ScholarPubMed
35Nachtigall, D, Nielsen, P, Fischer, R, Engelhardt, R, Gabbe, EE. Iron deficiency in distance runners. A reinvestigation using 59Fe-labelling and non-invasive liver iron quantification. Int. J. Sports Med. 1996; 17: 473–9.CrossRefGoogle Scholar
36Sen, CK. Oxidants and antioxidants in exercise. J. Appl. Physiol. 1995; 79: 675–86.CrossRefGoogle ScholarPubMed
37Jacob, RA, Burri, BJ. Oxidative damage and defence. Am. J. Clin. Nutr. 1996; 63: 985S–90S.CrossRefGoogle Scholar
38Dillard, CJ, Litov, RE, Savin, WM, Dumelin, EE, Tappel, AL. Effects of exercise, vitamin E, and ozone on pulmonary function and lipid peroxidation. J. Appl. Physiol. 1978; 45: 927–32.CrossRefGoogle ScholarPubMed
39Simon-Schnass, I, Babst, H. Influence of vitamin E on physical performance. Int. J. Vit. Nutr. Res. 1988; 58: 49–54.Google ScholarPubMed
40Leaf, DA, Kleinman, MT, Hamilton, M, Barstow, TJ. The effect of exercise intensity on lipid peroxidation. Med. Sci. Sports Exerc. 1997; 29: 1036–9.CrossRefGoogle ScholarPubMed
41Lovlin, R, Cottle, W, Pyke, I, Kavanagh, M, Belcastro, AN. Are indices of free radical damage related to exercise intensity?. Eur. J. Appl. Physiol. 1987; 56: 313–6.CrossRefGoogle ScholarPubMed
42Sumida, S, Tanaka, K, Kitao, H, Nakadomo, F. Exercise-induced lipid peroxidation and leakage of enzymes before and after vitamin E supplementation. Int. J. Biochem. 1989; 21: 835–8.Google ScholarPubMed
43Laaksonen, R, Fogelholm, M, Himberg, JJ, Laakso, J, Salorinne, Y. Ubiquinone supplementation and exercise capacity in trained young and older men. Eur. J. Appl. Physiol. 1995; 72: 95–100.CrossRefGoogle Scholar
44Margaritis, I, Tessier, F, Richard, M-J, Marconnet, P. No evidence of oxidative stress after a triathlon race in highly trained competitors. Int. J. Sports Med. 1997; 18: 186–90.CrossRefGoogle ScholarPubMed
45Alessio, HM. Exercise-induced oxidative stress. Med. Sci. Sports Exerc. 1993; 25: 218–24.CrossRefGoogle ScholarPubMed
46Weber, GF. The measurement of oxygen-derived free radicals and related substances in medicine. J. Clin. Chem. Clin. Biochem. 1990; 28: 569–603.Google ScholarPubMed
47Mena, P, Maynar, M, Gutierrez, JM, Maynar, J, Timon, J, Campillo, JE. Erythrocyte free radical scavenger enzymes in bicycle professional racers. Adaptation to training. Int. J. Sports Med. 1991; 12: 563–6.CrossRefGoogle ScholarPubMed
48Tiidus, PM, Pushkarenko, J, Houston, ME. Lack of antioxidant adaptation to short-term aerobic training in human muscle. Am. J. Physiol. 1996; 271: R832–6.Google ScholarPubMed
49Fogelholm, M, Himberg, J-J, Alopaeus, K, Gref, C-G, Laakso, J, Lehto, J, Mussalo-Rauhamaa, H. Dietary and biochemical indices of nutritional status in male athletes and controls. J. Am. Coll. Nutr. 1992; 11: 81–192.CrossRefGoogle ScholarPubMed
50Fogelholm, M. Vitamins, minerals and supplementation in soccer. J. Sports Sci. 1994; 12: S23–7.CrossRefGoogle ScholarPubMed
51Lukaski, HC, Hoverson, BS, Gallagher, SK, Bolonchuk, WW. Physical training and copper, iron, and zinc status of swimmers. Am. J. Clin. Nutr. 1990; 51: 1093–9.CrossRefGoogle ScholarPubMed
52Fogelholm, M, Laakso, J, Lehto, J, Ruokonen, I. Dietary intake and indicators of magnesium and zinc status in male athletes. Nutr. Res. 1991; 11: 1111–8.CrossRefGoogle Scholar
53Fogelholm, M, Lahtinen, P. Nutritional evaluation of a sailing crew during a transatlantic race. Scand. J. Med. Sci. Sports 1991; 1: 99–103.CrossRefGoogle Scholar
54Fogelholm, M, Rehunen, S, Gref, C-G, Laakso, J, Ruokonen, I, Himberg, J-J. Dietary intake and thiamin, iron and zinc status in elite Nordic skiers during different training periods. Int. J. Sport Nutr. 1992; 2: 351–65.CrossRefGoogle ScholarPubMed
55Guilland, J-C Penaranda, T, Gallet, C, Boggio, V, Fuchs, F, Klepping, J. Vitamin status of young athletes including the effects of supplementation. Med. Sci. Sports Exerc. 1989; 21: 441–9.CrossRefGoogle ScholarPubMed
56Robertson, JD, Maughan, RJ, Milne, AC, Davidson, RJL. Hematological status of male runners in relation to the extent of physical training. Int. J. Sport Nutr. 1992; 2: 366–75.CrossRefGoogle Scholar
57Rokitzki, L, Logemann, E, Huber, G, Keck, E, Keul, J. α-Tocopherol supplementation in racing cyclists during extreme endurance training. Int. J. Sports Nutr. 1994; 4: 253–64.CrossRefGoogle ScholarPubMed
58Haymes, EM, Spillman, DM. Iron status of women distance runners, sprinters, and control women. Int. J. Sports Med. 1989; 6: 430–3.CrossRefGoogle Scholar
59Keith, RE, Alt, RA. Riboflavin status of female athletes consuming normal diets. Nutr. Res. 1991; 11: 727–34.CrossRefGoogle Scholar
60Pate, RR, Miller, BJ, Davis, JM, Slentz, CA, Klingshirn, LA. Iron status of female runners. Int. J. Sport Nutr. 1993; 3: 222–31.CrossRefGoogle ScholarPubMed
61Risser, WL, Lee, EV, Poindexter, HBW, Steward, West M, Pivarnik, JM, Risser, JMH, Hickson, JF. Iron deficiency in female athletes: its prevalence and impact on performance. Med. Sci. Sports Exerc. 1988; 20: 116–21.CrossRefGoogle ScholarPubMed
62Jonnalagadda, SS, Benardot, D, Nelson, M. Energy and nutrient intakes of the United States National Women's Artistic Gymnastics Team. Int. J. Sport Nutr. 1998; 8: 331–44.CrossRefGoogle ScholarPubMed
63Ziegler, P, Hensley, S, Roepke, JB, Whitaker, SH, Graig, BW, Drewnowski, A. Eating attitudes and energy intakes of female skaters. Med. Sci. Sports Exerc. 1998; 30: 583–6.CrossRefGoogle ScholarPubMed
64van Erp-Baart, AMJ, Saris, WHM, Binkhorst, RA, Vos, JA, Elvers, JWH. Nationwide survey on nutritional habits in elite athletes. Part II. Mineral and vitamin intake. Int. J. Sports Med. 1989; 10: S11–6.CrossRefGoogle ScholarPubMed
65Fogelholm, M. Micronutrient status in females during a 24-week fitness-type exercise program. Ann. Nutr. Metab. 1992; 36: 209–18.CrossRefGoogle ScholarPubMed
66Pate, RR, Pratt, M, Blair, S, Haskell, WL, Macera, CA, Bouchard, C, Burchner, D, Ettinger, W, Health, GW, King, AC, et al. Physical activity and public health. A recommendation for the Centers for Diseases Control and Prevention and the American College of Sports Medicine. JAMA 1995; 273: 402–7.CrossRefGoogle Scholar
67Guezennec, CY, Chalabi, H, Bernard, J, Fardellone, P, Krentowski, R, Zerath, E, Meunier, PJ. Is there a relationship between physical activity and dietary calcium intake? A survey in 10,373 young French subjects. Med. Sci. Sports Exerc. 1998; 30: 732–9.CrossRefGoogle Scholar
68Takatsuka, N, Kawakami, N, Ohwaki, A, Ito, Y, Matsushita, Y, Ido, M, Shimizu, H. Frequent hard physical activity lowered serum beta-carotene level in a population study of a rural city of Japan. Tohoku. J. Exp. Med. 1995; 176: 131–5.CrossRefGoogle Scholar
69Belko, AZ, Obarzanec, E, Kalkwarf, HJ, Rotter, MA, Bogusz, S, Miller, D, Haas, JD, Roe, DA. Effects of exercise on riboflavin requirements of young women. Am. J. Clin. Nutr. 1983; 37: 509–17.CrossRefGoogle ScholarPubMed
70Belko, AZ, Obarzanec, E, Roach, R, Rotter, M, Urban, G, Weinberg, S, Roe, DA. Effects of aerobic exercise and weight loss on riboflavin requirements of moderately obese marginally deficient young women. Am. J. Clin. Nutr. 1984; 40: 553–61.CrossRefGoogle ScholarPubMed
71Belko, AZ, Meredith, MP, Kalkwarf, HJ, Obarzanek, E, Weinberg, S, Roach, R, McKeon, G, Roe, DA. Effects of exercise on riboflavin requirements: biological validation in weight reducing women. Am. J. Clin. Nutr. 1985; 41: 270–7.CrossRefGoogle ScholarPubMed
72Soares, MJ, Satyanarayana, K, Bamji, MS, Jacob, CM, Ramana, YV, Rao, SS. The effects of exercise on the riboflavin status of adult men. Br. J. Nutr. 1993; 69: 541–51.CrossRefGoogle ScholarPubMed
73Fogelholm, M, Ruokonen, I, Laakso, J, Vuorimaa, T, Himberg, J-J. Lack of association between indices of vitamin B1, B2, and B6 status and exercise-induced blood lactate in young adults. Int. J. Sport Nutr. 1993; 3: 165–76.CrossRefGoogle ScholarPubMed
74Fogelholm, GM, Koskinen, R, Laakso, J, Rankinen, T, Ruokonen, I. Gradual and rapid weight loss: effects on nutrition and performance in male athletes. Med. Sci. Sports Exerc. 1993; 25: 371–7.CrossRefGoogle ScholarPubMed
75Rokitzki, L, Hinkel, S, Klemp, C, Cuf, D, Keul, J. Dietary, serum and urine ascorbic acid status in male athletes. Int. J. Sports Med. 1994; 5: 435–40.CrossRefGoogle Scholar
76Fishbaine, B, Butterfield, G. Ascorbic acid status of running and sedentary men. Int. J. Vit. Nutr. Res. 1984; 54: 273.Google ScholarPubMed
77Kallner, A, Hartman, D, Hornig, D. Steady-state turnover and body pool of ascorbic acid in man. Am. J. Clin. Nutr. 1979; 32: 530–9.CrossRefGoogle ScholarPubMed
78Peters, EM, Bateman, ED. Ultramarathon running and upper respiratory tract infections. S Afr. Med. J. 1983; 64: 582–4.Google ScholarPubMed
79Peters, EM, Goetzsche, JM, Grobbelaar, B, Noakes, TM. Vitamin C supplementation reduces the incidence of postrace symptoms of upper-respiratory-tract infection in ultramarathon runners. Am. J. Clin. Nutr. 1993; 57: 170–4.CrossRefGoogle ScholarPubMed
80Nieman, DC, Johanssen, LM, Lee, JW, Arabatzis, K. Infectious episodes in runners before and after the Los Angeles marathon. J. Sports Med. Phys. Fitness 1990; 30: 316–28.Google ScholarPubMed
81Hemilä, H. Vitamin C and common cold incidence: a review of studies with subjects under heavy physical stress. Int. J. Sports Med. 1995; 17: 379–83.CrossRefGoogle Scholar
82Kitamura, Y, Tanaka, K, Kiyohara, C, Hirohata, T, Tomita, Y, Ishibashi, M, Kido, K. Relationship of alcohol use, physical activity and dietary habits with serum carotenoids, retinol and alpha-tocopherol among male Japanese smokers. Int. J. Epidemiol. 1997; 26: 307–14.CrossRefGoogle ScholarPubMed
83Thomas, TR, Ziogas, G, Yan, P, Schmitz, D, LaFontaine, T. Influence of activity level on vitamin E status in healthy mean and women and cardiac patients. J. Cardiopulm. Rehabil. 1998; 18: 52–9.CrossRefGoogle Scholar
84Karlsson, J, Diamant, B, Edlund, PO, Lund, B, Folkers, K, Theorell, H. Plasma ubiquinone, alpha-tocopherol and cholesterol in man. Int. J. Vit. Nutr. Res. 1992; 62: 160–4.Google ScholarPubMed
85Meydani, M, Evans, WJ, Handelman, G, Biddle, L, Fielding, RA, Meydani, SN, Burrill, J, Fiatarone, MA, Blumberg, JB, Cannon, JG. Protective effect of vitamin E on exercise-induced oxidative damage in young and older adults. Am. J. Physiol. 1993; 25: 218–24.Google Scholar
86Dekkers, JC, van Doornen, JP, Kemper, HCG. The role of antioxidant vitamins and enzymes in the prevention of exercise-induced muscle damage. Sports Med. 1996; 21: 213–38.CrossRefGoogle ScholarPubMed
87Fogelholm, M. Indicators of vitamins and mineral status in athletes' blood: a review. Int. J. Sport Nutr. 1995; 5: 267–84.CrossRefGoogle ScholarPubMed
88Schmidt, A, Jakob, E, Berg, A, Russmann, T, Konig, D, Irmer, M, Keul, J. Effect of physical exercise and vitamin C on absorption of ferric sodium citrate. Med. Sci. Sports Exerc. 1996; 28: 1470–3.CrossRefGoogle Scholar
89Rajaram, S, Weaver, CM, Lyle, RM, Sedlock, DA, Martin, B, Templin, TJ, Beard, JL, Percival, SS. Effects of long-term moderate exercise on iron status in young women. Med. Sci. Sports Exerc. 1995; 27: 1105–10.CrossRefGoogle ScholarPubMed
90Bourque, SP, Pate, RR, Branch, JD. Twelve weeks of endurance exercise training does not affect iron status measures in women. J. Am. Diet. Assoc. 1997; 97: 1116–21.CrossRefGoogle Scholar
91Fogelholm, M, Alopaeus, K, Silvennoinen, T, Teirila, J. Factors affecting iron status in non-pregnant women from urban south Finland. Eur. J. Clin. Nutr. 1993; 37: 567–74.Google Scholar
92Crespo, R, Relea, P, Lozano, D, Macarro-Sanchez, M, Villa, LF, Rico, H. Biochemical markers of nutrition in elite-marathon runners. J. Sports Med. Phys. Fitness. 1995; 35: 268–72.Google ScholarPubMed
93Spodaryk, K, Czeka, JJ, Sowa, W. Relationship among reduced level of stored iron and dietary iron in trained women. Physiol. Res. 1996; 45: 393–7.Google ScholarPubMed
94Nuviala, RJ, Castillo, MC, Lapieza, MG, Escanero, JF. Iron nutrition status in female karatekas, handball and basketball players, and runners. Physiol. Behav. 1996; 59: 449–53.CrossRefGoogle ScholarPubMed
95Pereira, D, Laires, MJ, Monteiro, CP, Rabacal, C, Ribeiro, H, Felisberto, G, Mendonca, C, Vaz, C, Nuno, L, Dias, M, Carvalho, E, Afonso, JS, Fernandes, JS. Oral magnesium supplementation in heavily trained football players: impact on exercise capacity and lipoperoxidation. In: Halpern, MJ, Durlach, J, eds. Current Research in Magnesium. London: John Libbey, 1996: 237–41.Google Scholar
96Dolev, E, Burstein, R, Lubin, F, Wikshnizer, R, Chetrit, A, Shef, M, Deuster, PA. Interpretation of zinc status indicators in a strenuously exercising population. J. Am. Diet. Assoc. 1995; 95: 482–4.CrossRefGoogle Scholar
97Anderson, RA, Bryden, NA, Polansky, MM, Deuster, PA. Exercise effects on chromium excretion of trained and untrained men consuming a constant diet. J. Appl. Physiol. 1988; 64: 249–52.CrossRefGoogle ScholarPubMed