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The aim of this study was to investigate the effect of post-activation potentiation (PAP), carbohydrate (CHO) mouth rinse, and the combination of both strategies on repeated sprint ability (RSA). Twenty male soccer players (age = 18.9 ± 0.9 years, body mass = 71.8 ± 5.2 kg, height = 178.2 ± 6.3 cm) randomly performed four experimental conditions before RSA test (six sets of 40 m): (I) placebo (PLA) control, (II) CHO mouth rinse (6% maltodextrin), (III) PAP + PLA, and (IV) PAP + CHO. The PAP protocol involved two sets of five repetitions (80% 1RM) of the back squat exercise. A one-way repeated measures analysis of variance followed by Bonferroni post hoc test was used to compare the experimental conditions. Results indicated that PAP + CHO and PAP + PLA had better results for the variables best sprint time, mean sprint time, and total sprint time compared with CHO and PLA (p<0.001; small effect size). No significant interaction between the experimental conditions was observed for the variable RSA performance decrement, and no significant difference between conditions, i.e., PAP + CHO vs. PAP + PLA and CHO vs. PLA control was found. In conclusion, PAP positively affects RSA performance in soccer players; however, the combination of PAP and CHO mouth rinse showed no additional effect. [ABSTRACT FROM AUTHOR]

The aim of this study was to analyze the effect of different intensities of PAP on vertical jump performance in university volleyball players. Twelve players performed anthropometric tests, 1 RM (repetition maximum) test in the squatting exercise, and familiarization with the vertical jump test. In subsequent weeks, the subjects underwent 5 more collection sessions with a 24-hr rest interval between them. Prior to each Counter Movement Jump (CMJ) test, the subjects performed an experimental condition: (a) Control; (b) PAP 91% 1RM; (c) PAP 85% 1RM; (d) PAP 70% 1RM; and (e) PAP 60% 1RM. The results showed that the Group submitted to the PAP protocol showed a significant difference in comparison to the Control Group, with higher PAP intensities of 91%, 85%, and 70% of 1 RM verified while the 60% intensity of 1RM showed no significant difference in comparison to the Control Group. The findings indicate that the PAP positively affects the performance of vertical jump in university volleyball players. [ABSTRACT FROM AUTHOR]