(Roundtable). Sport Sci Exch 1992;Spring:1-4.21. Millward J, Bowtell JL, et al. Physical activity, protein meta-bolism and protein requirements. Proc Nutr Soc 1994;53:223-40.22. Lemon PW. Do athletes need more dietary protein and amino acids? Intl J Sport Nutr 1995;5:S39-S61.23. Butterfield G, Kleiner S, Lemon P, et al. Methods of weight gain in athletes (Roundtable). Sport Sci Exch 1995;6:1-4.24. Lemon PWR, Mullin JP. Effect of initial muscle glycogen levels on protein catabolism during exercise. J Appl Phys 1980; 48:624-29.25. Iyenger A, Narasinga Rao B. Effect of varying energy and protein intake on nitrogen balance in adults engaged in heavy manual labour. Br J Nutr 1979;41:19-25.26. Phillips SM, Atkinson AS, Tarnopolsky MA, et al.. Gender differences in leucine kinetics and nitrogen balance in endurance athletes. J Appl Phys 1990;75:2134-2141.27. Campbell WW, Crim MC, Dallal GE, et al. Increased protein requirements in elderly people: new data and retro-spective reassessments. Am J Clin Nutr 1994;60:501-509.28. Young VR, Pellett PL. Plant proteins in relation to human protein and amino acid nutrition. Am J Clin Nutr 1994;59:1203S-1212S.29. Lambert EV, Speechly DP, Dennis SC, et al. Enhanced endurance in trained cyclists during moderate intensity exercise following 2 weeks adaptation to a high fat diet. Eur J Appl Physiol 1994;69:287-293.30. Muoio DM, Leddy JJ, Horvath PJ,et al. Effect of dietary fat on metabolic adjustments to maximal VO2 and endurance in runners. Med Sci Sports Exerc 1994;26:81-88.31. Sherman WM, Leenders N. Fat loading: the next magic bullet? Intl J Sport Nutr 1995;5:S1-S12.32. Jones NL, Heigenhauser GJF, Kuksis A, et al. Fat metabolism in heavy exercise. Clin Sci 1980;59:469-478.33. Ornish D, Brown SE, Scherwitz LW, et al. Can lifestyle changes reverse coronary heart disease? The Lifestyle Heart Trial. Lancet 1990;336:129-133.34. Kiens B, Essen-Gustavsson B, Gad P,et al. Lipoprotein lipase activity and intramuscular triglyceride stores after long-term high fat and high carbohydrate diets in physically trained men. Clin Physiol 1987;7:1-9.35. Heaney RP, Recker RR, Saville PD. Menopausal changes in calcium balance performance. J Lab Clin Med 1978;92:953-62.36. Heaney RP. Bone mass, nutrition, and other lifestyle factors. Nutr Rev 1996;45:S3-S14.37. Myburgh KH, Hutchins J, Fataar AB, et al. Low bone density is an etiologic factor for stress fractures in athletes. Ann Intern Med 1990;113:754-759.38. Wolman RL, Clark P, McNally E, et al. Dietary calcium as a statistical determinant of trabecular bone density in amenorrhoeic and oestrogen-replete athletes. Bone Mineral 1992;17:415-423.39. Robertson J, Maughan RJ, Davidson R. Faecal blood loss in response to exercise. BMJ 1987;295:303-305.40. Waller MF, Haymes EM. The effects of heat and exercise on sweat iron loss. Med Sci Sports Exerc 1996;28:197-203.41. Eichner ER. Runner's macrocytosis: a clue to footstrike hemolysis. Am J Med 1985;78:321-325.42. Selby GB, Eichner ER. Endurance swimming, intravascular hemolysis, anemia,& iron depletion. Am J Med 1988;81:791-93.43. Snyder AC, Dvorak LL, Roepke JB. Influence of dietary iron source on measures of iron status among female runners. Med Sci Sports Exerc 1989;21:7-10.44. Craig WJ. Iron status of vegetarians. Am J Clin Nutr 1994; 59:1233S-1237S.45. Lamanca J, Haymes E. Effects of low ferritin concentrations on endurance performance. Int J Sports Med 1992;2:376-385.46. Herbert V. Everyone should be tested for iron disorders. J