عنوان مقاله [English]
Background and Aim: Body building sport is probably most dependent to balanced and scientific nutrition. Therefore,
the purpose of this study was to design and evaluation of computerized diet programs on the performance and
anthropometric parameters in body builders. Materials and Methods: In a semi-experimental study, seven male
bodybuilder students were selected. One week of their regular diet analyzed by nutritional evaluation and diet therapy
software for energy and nutrients. Then, one week balanced diet was designed with the software according to body
builders’ dietary and exercise requirements (Energy=3000 kcal, 55-65 percent by carbohydrates, 20-25 percent by fat, 18
-20 percent by protein). The effectiveness of the diet was evaluated before and after diet therapy by comparison of
weight, body fat percent, circumferences (waist, hip, arm, thigh and wrist), muscular strength, muscle force, and 24 h
urine urea and creatinine concentrations. Daily diet consumption analysis was done by the software. Subjects had their
regular training exercise during both periods (three sessions of weight training per week). To evaluate the effectiveness
of balanced diet, dependent t-test was implemented and Pearson's regression also was used to find any relation
between parameters (p<0.05). Results: The results of this research showed significant increase in the chest, arm, and
thigh circumferences as well as standing long jump, vertical jump, hand dynamometry, lift dynamometry, one repetition
maximum leg press, curl up, and pull-up chest press and a significant decrease in the body fat percent and chest
circumference has seen found (p<0.05). Furthermore, a significant and positive correlation was found between chest
and arm circumferences (r=0.80) and between chest and thigh circumferences (r=0.87)(p<0.05). Among functional
parameters, hand grip and lift dynamometer (r=0.75), long and vertical jumps (r=0.82) showed positive correlations.
Conclusion: With regard to the results of this research it may conclude that a designed balanced diet in term of energy
and macronutrients when considered individual and sporting requirements as well as appropriate training needs is able
to improve body composition, anthropometric parameters and athletic performance without necessary for supplementation.
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