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Correlation analyses and regression modeling between isokinetic testing and on-court performance in competitive adolescent tennis players.

Abstract：

:Tennis requires skill, physical attributes, and strategy. Ball velocity and placement are two of the most important components in winning the faster-paced modern game. Although isokinetic testing has been used to evaluate physical characteristics and injury potential in tennis players, few studies have compared isokinetics and on-court performance. Such a comparison would help establish links between speed-specific properties of functioning muscles and stroke production and could affect overall training strategy. This study compared isokinetic peak torque (PT), average power (AP), and total work (TW) during specific testing patterns correlated with ball velocity or stroke accuracy during the service, forehand, and backhand and developed predictive equations for each stroke using these variables. Thirty-five players, aged 13-18 years with at least 4 years playing experience, were evaluated using internal and external shoulder rotation, leg extension, and diagonal throwing motions. Ball velocity was measured using a radar gun. Accuracy was evaluated on the basis of shot position and depth. Significant correlations were found between ball velocity and a number of isokinetic variables, while no significant correlations were observed with shot accuracy. Significant isokinetic variables for each stroke were entered into regression models. One isokinetic speed sufficiently predicted ball velocity for each stroke, since no increase in predictive capacity was observed with the addition of other isokinetic parameters. We conclude that isokinetics at testing speeds between 1.57 and 4.71 rad.s(-1) can effectively predict ball velocity, but not accuracy, and that our results may be helpful in planning strategies for training and rehabilitation.

journal_name

J Strength Cond Res

journal_title

Journal of strength and conditioning research

authors

Signorile JF,Sandler DJ,Smith WN,Stoutenberg M,Perry AC

doi

10.1519/R-15514.1

keywords:

subject

Has Abstract

pub_date

2005-08-01 00:00:00

pages

519-26

issue

eissn

1064-8011

issn

1533-4287

pii

R-15514

journal_volume

pub_type

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Correlation analyses and regression modeling between isokinetic testing and on-court performance in competitive adolescent tennis players.