Effects of dynamic and static stretching on vertical jump performance and electromyographic activity

Hough, Paul and Ross, Emma and Howatson, Glyn (2009) Effects of dynamic and static stretching on vertical jump performance and electromyographic activity. Journal of Strength & Conditioning Research:, 23 (2). pp. 507-512. ISSN 1064-8011

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Official URL: http://dx.doi.org/10.1519/JSC.0b013e31818cc65d

Abstract

The results of previous research have demonstrated that static stretching (SS) can reduce muscular performance and that dynamic stretching (DS) can enhance muscular performance. The purpose of this study was to assess the effects of SS and DS on vertical jump (VJ) performance and electromyographic (EMG) activity of the m. vastus medialis. Eleven healthy men (age 21 ± 2 years) took part in 3 conditions (no stretching [NS], SS, and DS), on separate occasions in a randomized, crossover design. During each condition, measurements of VJ height and EMG activity during the VJ were recorded. A repeated-measures analysis of variance and post hoc analysis indicated that VJ height was significantly less (4.19 ± 4.47%) after SS than NS (p < 0.05) and significantly greater (9.44 ± 4.25%) in DS than SS (p < 0.05). There was significantly greater EMG amplitude in the DS compared with the SS (p < 0.05). The results demonstrated that SS has a negative influence on VJ performance, whereas DS has a positive impact. Increased VJ performance after DS may be attributed to postactivation potentiation, whereas the reduction in VJ performance after SS may be attributable to neurological impairment and a possible alteration in the viscoelastic properties of the muscular tendon unit (MTU). This investigation provides some physiological basis for the inclusion of DS and exclusion of SS in preparation for activities requiring jumping performance.

Item Type: Journal Article
Uncontrolled Keywords: Evaluation, Jumping, Influence, Stretching exercises, Physiological aspects, Electromyography, Muscle strength, Cricket, Muscular system, Changes, Exercise, Electrodes
Subjects: 600 Technology > 612 Human physiology
700 The arts; fine & decorative arts; recreation > 796 Athletic & outdoor sports & games
School/Department: School of Sport, Health and Applied Science
Depositing User: Catherine O'Sullivan
Date Deposited: 16 Dec 2014 13:29
Last Modified: 16 Dec 2014 13:29
URI: http://research.stmarys.ac.uk/id/eprint/804

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