RESEARCH ARTICLE


Maximum Strength in Squats Determines Jumping Height in Young Female Volleyball Players



Sofia Ryman Augustsson*
Department of Food and Nutrition and Sport Science, Faculty of Education, University of Gothenburg, Box 300, SE 40530 Göteborg, Sweden

Article Information


Identifiers and Pagination:

Year: 2013
Volume: 6
First Page: 41
Last Page: 46
Publisher ID: TOSSJ-6-41
DOI: 10.2174/1875399X01306010041

Article History:

Received Date: 26/02/2013
Revision Received Date: 12/07/2013
Acceptance Date: 16/07/2013
Electronic publication date: 20/08/2013
Collection year: 2013

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Creative Commons License
© 2013 Augustsson et al.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Department of Food and Nutrition and Sport Science, Faculty of Education, University of Gothenburg, Box 300, SE 40530 Göteborg, Sweden; Tel: 0046(0)31 7862237; Fax: 0046(0)31 7862348; E-mail: sofia.augustsson@gu.se


Abstract

Few data exist on the relationship between maximum strength and power performance, such as jumping ability in low-level female volleyball players. The aim of the present study was to determine the relationship between maximum strength and jumping performance in young female non-elite volleyball players before and after an in-season resistancetraining protocol. A 26-week, in-season resistance-training program was carried out on ten female volleyball players, aged 19 (±2). The 1 RM squat test was used to evaluate the players’ maximum strength in the lower extremities and a vertical jump (VJ) test was used to assess functional performance and power. There was a significant enhancement of 69% (p=0.005) for the squat test and 9% for the VJ test (p=0.008). A strong significant relationship was found between the VJ test and the 1 RM squat test (r=0.68, r2=0.47, p=0.0014) at the pre-test and post-test (r=0.88, r2=0.77, p=0.001). When comparing the coefficients of correlation (r=0.68 and r=0.88) between the squat tests and VJ tests, the difference that was noted was significant (p<0.001). A strong significant relationship was also noted between the 1RM squat and VJ test relative to body weight at pre-test (r=0.89, r2=0.79, p=0.001) and post-test (r=0.95, r2=0.90), p<0.001). This study demonstrates that maximum strength in squats is a major predictive factor for jumping height in young female volleyball players. Female volleyball players might therefore consider focusing on maximum strength training to improve their jumping performance.

Keywords: Jumping performance, Correlation, 1 RM squat, Resistance training.