BACKGROUND: The consumption of a high protein diet (>4  g/kg/d) in trained @entity1 and @entity1 who did not alter their exercise program has been previously shown to have no significant effect on body composition. Thus, the purpose of this investigation was to determine if a high protein diet in conjunction with a periodized heavy resistance training program would affect indices of body composition, performance and health. METHODS: Forty-eight healthy resistance-trained @entity1 and @entity1 completed this study (mean        SD; Normal Protein group [NP n   =   17, four female and 13 male]: 24.8        6.9  yr; 174.0        9.5  cm height; 74.7        9.6  kg body weight; 2.4        1.7  yr of training; High Protein group [ @entity4306 n   =   31, seven female and 24 male]: 22.9        3.1  yr; 172.3        7.7  cm; 74.3        12.4  kg; 4.9        4.1  yr of training). Moreover, all subjects participated in a split-routine, periodized heavy resistance-training program. Training and daily diet logs were kept by each subject. Subjects in the NP and @entity4306 groups were instructed to consume their baseline (~2  g/kg/d) and >3  g/kg/d of dietary protein, respectively. RESULTS: Subjects in the NP and @entity4306 groups consumed 2.3 and 3.4  g/kg/day of dietary protein during the treatment period. The NP group consumed significantly (p   <   0.05) more protein during the treatment period compared to their baseline intake. The @entity4306 group consumed more (p   <   0.05) total energy and protein during the treatment period compared to their baseline intake. Furthermore, the @entity4306 group consumed significantly more (p   <   0.05) total calories and protein compared to the NP group. There were significant time by group (p    <=   0.05) changes in body weight (change: +1.3        1.3  kg NP, -0.1        2.5 @entity4306 ), fat mass (change: -0.3        2.2  kg NP, -1.7        2.3 @entity4306 ), and % body fat (change: -0.7        2.8 NP, -2.4        2.9 @entity4306 ). The NP group gained significantly more body weight than the @entity4306 group; however, the @entity4306 group experienced a greater decrease in fat mass and % body fat. There was a significant time effect for @entity6120 ; however, there was a non-significant time by group effect for @entity6120 (change: +1.5        1.8 NP, +1.5        2.2 @entity4306 ). Furthermore, a significant time effect (p    <=   0.05) was seen in both groups vis a vis improvements in maximal strength (i.e., 1-RM squat and bench) vertical jump and pull-ups; however, there were no significant time by group effects (p   >=    0.05) for all exercise performance measures. Additionally, there were no changes in any of the blood parameters (i.e., basic metabolic panel). CONCLUSION: Consuming a high protein diet (3.4 g/kg/d) in conjunction with a heavy resistance-training program may confer benefits with regards to body composition. Furthermore, there is no evidence that consuming a high protein diet has any deleterious effects.

A high protein diet (3.4  g/kg/d) combined with a heavy resistance training program improves body composition in healthy trained XXXX and @entity1 - a follow-up investigation.

@entity1 :: ('9606', 'Species') :: ['women', 'men'] @entity6120 :: ('MESH:C535804', 'Disease') :: ['FFM'] @entity4306 :: ('MESH:C537262', 'Disease') :: ['HP']
@entity1 :: (9606,Species) :: ['men']
