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significantly different (p < 0.05) than BL; ** = significantly different (p < 0.05) than RL RESULTS Average daily dietary intake is shown in Table 2. No significant difference in daily caloric intake was seen between the groups. However, significant differences in total and relative protein intake were seen between all three groups. Significant differences were also observed in carbohydrate intake between BL and AL. The protein and carbohydrate composition of the diet was also significantly different between all three groups. No changes from PRE in body mass, lean body mass or percent body fat were observed in any group, and no between group differences were observed (see Table 3). Interestingly, lean body mass was increased by 1.1 ± 2.2 kg in AL, 0.8 ± 1.5 kg in RL and no change (0.0 ± 1.6 kg) seen in BL. However, these changes were not significantly different. for all groups in the 1-RM squat and 1-RM bench press (see Table 3). However, no significant differences between the groups were seen. Although strength comparisons showed that subjects in AL had the largest magnitude in strength improvements in both 1-RM squat (63% and 22% greater than BL and RL, respectively) and 1-RM bench press strength (35% and 42% greater than BL and RL, different. Resting total testosterone, cortisol, T/C ratio, growth hormone, and IGF-I concentrations are shown in Figures 1-5, respectively. No significant changes from PRE were observed in any of the groups, and no between groups differences were seen in any of the hormones measured. In addition, no correlations were seen between testosterone concentrations and dietary protein intake (r = 0.09) and the protein/carbohydrate ratio (r = 0.08). DISCUSSION The purpose of this study was to examine whether protein intakes above recommended levels (> 2.0 g strength/power athletes. In addition, the effect of varying protein intakes on resting hormonal concentrations was also examined. Results were unable to show any significant evidence indicating that protein intakes above 2.0 g composition changes in college strength/power athletes. In addition, elevated protein intakes in combination with resistance training were also shown not to alter resting hormonal concentrations. |
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Study 