![]() Dietary modifications during the last week to enhance muscle definition and fullness (peaking) and psychosocial issues will also be covered. Therefore, the purpose of this article is to review the scientific literature on topics relevant to nutrition and supplementation for bodybuilding competition preparation. Some have a strong scientific basis however, many do not. ![]() Competitors partake in numerous dietary and supplementation strategies to prepare for a contest. This is typically achieved through a decreased caloric intake, intense strength training, and increased cardiovascular exercise. Preparation for bodybuilding competition involves drastic reductions in body fat while maintaining muscle mass. In the United States, over 200 amateur natural (drug tested) bodybuilding contests occurred during 2013 and the number of contests is expected to increase in 2014. The popularity of natural bodybuilding is increasing rapidly. ![]() Finally, competitors should be aware of the increased risk of developing eating and body image disorders in aesthetic sport and therefore should have access to the appropriate mental health professionals. Thus, if carbohydrate loading is pursued it should be practiced prior to competition and its benefit assessed individually. Increasing carbohydrate intake at the end of preparation has a theoretical rationale to improve appearance, however it is understudied. The practice of dehydration and electrolyte manipulation in the final days and hours prior to competition can be dangerous, and may not improve appearance. Among popular supplements, creatine monohydrate, caffeine and beta-alanine appear to have beneficial effects relevant to contest preparation, however others do not or warrant further study. ![]() However, alterations in nutrient timing and frequency appear to have little effect on fat loss or lean mass retention. Eating three to six meals per day with a meal containing 0.4-0.5 g/kg bodyweight of protein prior and subsequent to resistance training likely maximizes any theoretical benefits of nutrient timing and frequency. Within this caloric intake, most but not all bodybuilders will respond best to consuming 2.3-3.1 g/kg of lean body mass per day of protein, 15-30% of calories from fat, and the reminder of calories from carbohydrate. Caloric intake should be set at a level that results in bodyweight losses of approximately 0.5 to 1%/wk to maximize muscle retention. This paper reviewed the scientific literature relevant to competition preparation on nutrition and supplementation, resulting in the following recommendations. The popularity of natural bodybuilding is increasing however, evidence-based recommendations for it are lacking. ![]()
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