Effect of timing of eccentric hamstring strengthening exercises during soccer training: implications for muscle fatigability

Small, K., McNaughton, L., Greig, M. and Lovell, R. (2009) Effect of timing of eccentric hamstring strengthening exercises during soccer training: implications for muscle fatigability. Journal of Strength & Conditioning Research, 23 (4). pp. 1077-1083. ISSN 1064-8011

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Abstract

The purpose of this study was to examine the effects of a field-based injury prevention exercise on eccentric hamstring strength during simulated soccer match play. Sixteen semiprofessional soccer players (age 21.3 +/- 2.9 years; height 185.0 +/- 8.7 cm; body mass 81.6 +/- 6.7 kg) completed the Soccer-specific Aerobic Field Test (SAFT90), a multidirectional 90-minute exercise protocol representative of soccer match play. Subjects performed 3 maximal dominant-limb isokinetic contractions at 120 degrees x s(-1) for concentric knee extensors (conQ) and flexors (conH), and eccentric knee flexors (eccH) before SAFT90 (t0), at half-time (t45), and immediately after the SAFT90 (t105). After baseline testing, subjects were divided into 2 groups, either performing Nordic hamstring eccentric strengthening exercises during the cool-down (CD) or warm-up (WU) of twice-weekly training sessions. After an 8-week intervention program, the baseline testing was repeated. The WU group displayed a significant increase postintervention in eccH gravity-corrected peak torque (PT) and the functional eccH:conQ ratio at t0 (p < 0.01), a significantly greater improvement compared with CD group (p < 0.05). Conversely, the CD group displayed a significant increase in both eccH PT and the functional eccH:conQ ratio postintervention at t45 (p < 0.05) and at t105 (p < 0.05), which were significantly greater increases compared with the WU group (p < 0.05). These findings indicate that the training intervention had a time-dependent beneficial effect on eccentric hamstring strength and that strength training conducted posttraining significantly reduced the negative influence of fatigue.

Item Type: Article
Subjects: Q Science > Q Science (General)
Q Science > QP Physiology
Divisions: Sports Science
Date Deposited: 16 Dec 2010 14:23
URI: http://repository.edgehill.ac.uk/id/eprint/1870

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