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Surface electromyographic assessment of the effect of dynamic activity and dynamic activity with static stretching of the gastrocnemius on vertical jump performance.
J Strength Cond Res. 2008 May; 22(3):787-93.JS

Abstract

The purpose of this study was to investigate the effects of dynamic activity and dynamic activity/static stretching of the gastrocnemius muscle on vertical jump (VJ) performance. Additionally, muscle activity was recorded using electromyography. Thirteen healthy adults (7 men and 6 women) with a mean age of 26 +/- 4 years served as subjects. The average jump height and muscle activity from 3 separate maximal VJ attempts were performed at the start of each session to be used as baseline measures using the Kistler force plate and the Noraxon telemetry EMG unit. Subjects then performed 1 of 2 protocols: dynamic activity only or dynamic activity with static stretching. Each protocol was followed by 3 maximal VJ trials. Average VJ height was analyzed using a 2 (time: pre, post) x 2 (prejump protocol: dynamic activity, dynamic activity + stretching) analysis of variance with repeated measures on both factors. A paired-samples t-test was used to compare the intraday difference scores for EMG activity between the 2 conditions. Jump height was not influenced by the interaction of pre-post and protocol (p = 0.0146. There was no difference for the main effects of time (p = 0.274) and pre-jump protocol (p = 0.595). Gastrocnemius muscle activity was likewise not different for the 2 prejump protocols (p = 0.413). The results from this study imply that the use of static stretching in combination with dynamic activity of the gastrocnemius muscle does not appear to have an adverse affect on VJ height performance. The practical importance concerns the warm-up routine that coaches and athletes employ; that is, they may want to consider including an aerobic component when statically stretching the gastrocnemius immediately prior to a vertical jumping event.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Wallmann HW
Department of Physical Therapy, University of Nevada, Las Vegas, Nevada, USA. harvey.wallmann@unlv.edu
Mercer JA
No affiliation info available
Landers MR
No affiliation info available

MeSH

AdultCohort StudiesElectromyographyFemaleHumansMaleMuscle ContractionMuscle StrengthMuscle Stretching ExercisesMuscle, SkeletalPhysical EnduranceProbabilityReference ValuesSportsTask Performance and AnalysisTorque

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

18438239

Citation

Wallmann, Harvey W., et al. "Surface Electromyographic Assessment of the Effect of Dynamic Activity and Dynamic Activity With Static Stretching of the Gastrocnemius On Vertical Jump Performance." Journal of Strength and Conditioning Research, vol. 22, no. 3, 2008, pp. 787-93.
Wallmann HW, Mercer JA, Landers MR. Surface electromyographic assessment of the effect of dynamic activity and dynamic activity with static stretching of the gastrocnemius on vertical jump performance. J Strength Cond Res. 2008;22(3):787-93.
Wallmann, H. W., Mercer, J. A., & Landers, M. R. (2008). Surface electromyographic assessment of the effect of dynamic activity and dynamic activity with static stretching of the gastrocnemius on vertical jump performance. Journal of Strength and Conditioning Research, 22(3), 787-93. https://doi.org/10.1519/JSC.0b013e3181660e27
Wallmann HW, Mercer JA, Landers MR. Surface Electromyographic Assessment of the Effect of Dynamic Activity and Dynamic Activity With Static Stretching of the Gastrocnemius On Vertical Jump Performance. J Strength Cond Res. 2008;22(3):787-93. PubMed PMID: 18438239.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Surface electromyographic assessment of the effect of dynamic activity and dynamic activity with static stretching of the gastrocnemius on vertical jump performance. AU - Wallmann,Harvey W, AU - Mercer,John A, AU - Landers,Merrill R, PY - 2008/4/29/pubmed PY - 2008/8/8/medline PY - 2008/4/29/entrez SP - 787 EP - 93 JF - Journal of strength and conditioning research JO - J Strength Cond Res VL - 22 IS - 3 N2 - The purpose of this study was to investigate the effects of dynamic activity and dynamic activity/static stretching of the gastrocnemius muscle on vertical jump (VJ) performance. Additionally, muscle activity was recorded using electromyography. Thirteen healthy adults (7 men and 6 women) with a mean age of 26 +/- 4 years served as subjects. The average jump height and muscle activity from 3 separate maximal VJ attempts were performed at the start of each session to be used as baseline measures using the Kistler force plate and the Noraxon telemetry EMG unit. Subjects then performed 1 of 2 protocols: dynamic activity only or dynamic activity with static stretching. Each protocol was followed by 3 maximal VJ trials. Average VJ height was analyzed using a 2 (time: pre, post) x 2 (prejump protocol: dynamic activity, dynamic activity + stretching) analysis of variance with repeated measures on both factors. A paired-samples t-test was used to compare the intraday difference scores for EMG activity between the 2 conditions. Jump height was not influenced by the interaction of pre-post and protocol (p = 0.0146. There was no difference for the main effects of time (p = 0.274) and pre-jump protocol (p = 0.595). Gastrocnemius muscle activity was likewise not different for the 2 prejump protocols (p = 0.413). The results from this study imply that the use of static stretching in combination with dynamic activity of the gastrocnemius muscle does not appear to have an adverse affect on VJ height performance. The practical importance concerns the warm-up routine that coaches and athletes employ; that is, they may want to consider including an aerobic component when statically stretching the gastrocnemius immediately prior to a vertical jumping event. SN - 1533-4287 UR - https://www.unboundmedicine.com/medline/citation/18438239/Surface_electromyographic_assessment_of_the_effect_of_dynamic_activity_and_dynamic_activity_with_static_stretching_of_the_gastrocnemius_on_vertical_jump_performance_ DB - PRIME DP - Unbound Medicine ER -