Effects of upper extremity plyometrics on throwing velocity and isokinetic muscle strength of shoulder rotators in female handball players

Purpose of this study is to investigate the effects of upper extremity plyometrics on throwing velocity and isokinetic muscle strength of shoulder rotators in female team handball players. Methods Sixteen subjects were volunteered to participate to this study. The subjects were randomized into plyometric exercises group (PG) (n=8) and daily training control group (CG) (n=8). Plyometric group (PG) performed plyometric exercises in addition to their daily training while control group (CG) just executed their daily training. Throwing velocities were tested in two types of throws which were standing throwing velocity (STV) and 3-step throwing velocity (3STV). Shoulder internal (IR) and external rotation (ER) peak torque were examined in 90, 300 °/s velocities before and after six weeks plyometric training period. Results Throwing velocities significantly increased in both PG and CG (P<0,05). Peak torque of IR (300 °/s) in dominant arm and peak torque of ER (90 °/s) in non-dominant arm were significantly increased in PG (P<0,05). Also, peak torque of IR and ER (300 °/s) in dominant arm and peak torque of IR (300 °/s) in non-dominant arm were significantly increased in CG (P<0,05). But when both groups compared there were no significantly difference neither throwing velocities nor peak torques. There was a significant positive correlation between STV and peak torques of IR (90, 300 °/s) (r=0,56 P=0,01, and r=0,52 P=0,01 respectively). There was a significant correlation between peak torque of ER (90 °/s) and 3STV (r=0,49 P=0,02). Discussion Upper extremity pylometrics are used commonly in handball training (Kvorning T., 2006) but there is no avialable study in the literature. Some findings of throwing velocities after plyometric exercises conflict with a research in baseball which is similar with overarm throwing (Carter et al., 2007). It seems to six weeks plyometric exercises have no additional improvements on throwing velocities and isokinetic muscle strength of shoulder rotators in female handball players in our study. Altough we could not show any additional effect of plyometrics, we think that it could integrated into the handball training as a sport specific exercise.
© Copyright 2009 14th annual Congress of the European College of Sport Science, Oslo/Norway, June 24-27, 2009, Book of Abstracts. Published by The Norwegian School of Sport Sciences. All rights reserved.

Subjects: handball female plyometrics training relation performance throws velocity muscle strength arm shoulder
Notations: training science sport games
Published in: 14th annual Congress of the European College of Sport Science, Oslo/Norway, June 24-27, 2009, Book of Abstracts
Editors: S. Loland, K. Boe, K. Fasting, J. Hallen, Y. Ommundsen, G. Roberts, E. Tsolakidis
Published: Oslo The Norwegian School of Sport Sciences 2009
Pages: 67-68
Document types: congress proceedings
Language: English
Level: advanced