Title

Effects of eccentric exercise on optimum length of the knee flexors and extensors during the preseason in professional soccer players

Document Type

Journal Article

Publisher

Elsevier

Faculty

Computing, Health and Science

School

Exercise, Biomedical & Health Science/Centre for Exercise and Sports Science Research

RAS ID

10834

Comments

This article was originally published as: Brughelli, M. , Mendiguchia, J., Nosaka, K. , Idoate, F., Los Arcos, A., & Cronin, J. B. (2010). Effects of eccentric exercise on optimum length of the knee flexors and extensors during the preseason in professional soccer players. Physical Therapy in Sport, 11(2), 50-55. NOTICE: this is the author’s version of a work that was accepted for publication in Physical Therapy in Sport. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Physical Therapy in Sport, 11,2, (2010) DOI#” .

Abstract

Objective: To assess the effects of eccentric exercise on optimum lengths of the knee flexors and extensors during the preseason in professional soccer. Design: Twenty-eight athletes from a professional Spanish soccer team (Division II) were randomly assigned to an eccentric exercise intervention group (EG) or a control group (CG). Over the four-week period two athletes from the control group suffered RF injuries and two athletes were contracted by other clubs. After these exclusions, both groups (EG, n ¼ 13; and CG, n ¼ 11) performed regular soccer training during the four-week preseason period. Results: After the four weeks, the optimum lengths of the knee flexors were significantly (P < 0.05) increased by 2.3 in the CG and by 4.0 in the EG. The change in the EG was significantly (P < 0.05) greater than that of the CG. The optimum lengths of the knee extensors were significantly increased only in the EG by 6.5 . Peak torque levels and ratios of quadriceps to hamstring (Q/H ratios) were not significantly altered throughout the study for either group. Conclusion: Eccentric exercise can increase the optimum lengths of both the knee extensors and knee extensors flexors during the preseason in professional soccer.

DOI

10.1016/j.ptsp.2009.12.002

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Link to publisher version (DOI)

10.1016/j.ptsp.2009.12.002