| dc.description.abstract | The objective of this study was to verify the countermovement jump (CMJ) effectiveness as a way to monitor the acute fatigue, caused by two sessions, moderate and intense, of the plyometric training (PT). The study was performed considering 11 male volunteers, and all of them are volleyball players. The sample presented the following average and standard deviation: age 17.1 ± 0.7, body mass 74.7 ± 9.7 kg, height 1.87 ± 0.07 m and body fat 9.4 ± 4.2%. The volunteers were submitted to an evaluation of CMJ performance, before and after the two PT sessions. In the 1st session, on which the volunteers were submitted to a moderate training burden (number of jumps = 105; maximum % of CMJ height related to average and standard deviation = 70 ± 12,5%), there was a reduction of 0,5 cm on the CMJ performance, decreasing from 40,4 ± 5,9 cm (pre-test) to 39,9 ± 6,5 cm (post-test). However these data indicates a performance reduction, the paired T-test did not result in a significant difference (P=0,547). In the 2nd session, on which the volunteers were submitted to an intense training burden (number of jumps = 126; maximum % of CMJ height related to average and standard deviation = 90 ± 4,6%), there was an increase of 1,7 cm on CMJ performance, from 39,0 ± 5,9 cm (pre-test) to 40,7 ± 6,9 cm (post-test). In accordance to the paired T-test, the intense session resulted in a significant performance increase (p= 0,013). Thus, considering the tests results, it was not possible to verify the CMJ effectiveness as a way to monitor the acute fatigue immediately after two PT sessions. The sample size and characteristics and the training volume performed seems to be the main factors to explain the absence of acute fatigue on the two PT sessions. | |
