Evidence supporting the use of: Calories
For the health condition: Body Building

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Synopsis

Source of validity: Scientific
Rating (out of 5): 5

Calories play a foundational role in bodybuilding, with extensive scientific evidence supporting their importance for muscle growth, maintenance, and overall performance. Calories are units of energy derived from macronutrients (carbohydrates, proteins, and fats), and their adequacy is crucial for supporting the increased energy demands of resistance training and muscle hypertrophy. Numerous studies have demonstrated that a caloric surplus—consuming more calories than the body expends—is necessary to optimize muscle protein synthesis and maximize gains in lean body mass during a bodybuilding program. Conversely, inadequate caloric intake can result in muscle loss, impaired recovery, and decreased performance.

Research published in journals such as Sports Medicine and the Journal of the International Society of Sports Nutrition outlines specific caloric and macronutrient recommendations for athletes involved in strength training and bodybuilding. These recommendations are based on controlled trials and observational studies that show a direct relationship between caloric intake, muscle growth, and fat loss, depending on the phase of training. Bodybuilders often manipulate caloric intake strategically, increasing calories during bulking phases to promote muscle gain and reducing them during cutting phases to decrease body fat while attempting to preserve muscle mass. Overall, the use of calories to support bodybuilding is among the most scientifically validated nutritional strategies in sports and exercise nutrition.

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