Однако при подготовке к соревнованиям бодибилдеры снижают [[Калорийность рациона спортсмена|калорийность диеты]] и подвергают себя серьёзным [[Силовые и кардиотренировки|силовым и кардиотренировкам]], за счёт чего тело спортсмена становится более рельефным<ref>Kleiner SM, Bazzarre TL, Litchford MD: Metabolic profiles, diet, and health practices of championship male and female bodybuilders. J Am Diet Assoc 1990, 90:962-967.Kleiner SM, Bazzarre TL, Litchford MD: Metabolic profiles, diet, and health practices of championship male and female bodybuilders. J Am Diet Assoc 1990, 90:962-967.</ref><ref>Sandoval WM, Heyward VH: Food selection patterns of bodybuilders. Int J Sport Nutr 1991, 1:61-68.http://www.ncbi.nlm.nih.gov/pubmed/1844403?dopt=Abstract&holding=f1000,f1000m,isrctn</ref><ref>Bamman MM, Hunter GR, Newton LE, Roney RK, Khaled MA: Changes in body composition, diet, and strength of bodybuilders during the 12 weeks prior to competition. J Sports Med Phys Fitness 1993, 33:383-391.http://www.ncbi.nlm.nih.gov/pubmed/8035587?dopt=Abstract&holding=f1000,f1000m,isrctn</ref><ref>Lambert CP, Frank LL, Evans WJ: Macronutrient considerations for the sport of bodybuilding. Sports Med 2004, 34:317-327.http://www.ncbi.nlm.nih.gov/pubmed/15107010?dopt=Abstract&holding=f1000,f1000m,isrctn</ref><ref>Maestu J, Eliakim A, Jurimae J, Valter I, Jurimae T: Anabolic and catabolic hormones and energy balance of the male bodybuilders during the preparation for the competition. J Strength Cond Res 2010, 24:1074-1081. http://www.ncbi.nlm.nih.gov/pubmed/20300017?dopt=Abstract&holding=f1000,f1000m,isrctn</ref><ref>Sandoval WM, Heyward VH, Lyons TM: Comparison of body composition, exercise and nutritional profiles of female and male body builders at competition. J Sports Med Phys Fitness 1989, 29:63-70.http://www.ncbi.nlm.nih.gov/pubmed/2770270?dopt=Abstract&holding=f1000,f1000m,isrctn</ref><ref>Walberg-Rankin J, Edmonds CE, Gwazdauskas FC: Diet and weight changes of female bodybuilders before and after competition. Int J Sport Nutr 1993, 3:87-102. http://www.ncbi.nlm.nih.gov/pubmed/8499941?dopt=Abstract&holding=f1000,f1000m,isrctn</ref><ref>Withers RT, Noell CJ, Whittingham NO, Chatterton BE, Schultz CG, Keeves JP: Body composition changes in elite male bodybuilders during preparation for competition. Aust J Sci Med Sport 1997, 29:11-16.http://www.ncbi.nlm.nih.gov/pubmed/9127683?dopt=Abstract&holding=f1000,f1000m,isrctn</ref><ref>van der Ploeg GE, Brooks AG, Withers RT, Dollman J, Leaney F, Chatterton BE: Body composition changes in female bodybuilders during preparation for competition. Eur J Clin Nutr 2001, 55:268-277.http://www.ncbi.nlm.nih.gov/pubmed/11360131?dopt=Abstract&holding=f1000,f1000m,isrctn</ref><ref>Newton LE, Hunter GR, Bammon M, Roney RK: Changes in psychological state and self-reported diet during various phases of training in competitive bodybuilders. J Strength Cond Res 1993, 7:153-158. OpenURL</ref>.В целом, каждый из описанных факторов требует повышения уровня потребления протеинов, и особенно, если эти факторы действуют в совокупности<ref>Helms ER, Zinn C, Rowlands DS, Brown SR: A systematic review of dietary protein during caloric restriction in resistance trained lean athletes: a case for higher intakes. Int J Sport Nutr Exerc Metab 2013. Epub ahead of print</ref>. Оптимальный уровень потребления протеина бодибилдерами во время подготовки к соревнованиям должен быть существенно выше обычно рекомендуемых норм.

=== Потребность в протеине для [[эктоморф]]а ===