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Acute effects of antagonist stretching on jump height, torque, and electromyography of agonist musculature.

Abstract

Although there has been substantial research on the acute effects of static stretching on subsequent force and power development, the outcome after stretching of the antagonist musculature has not been examined. The purpose of this study was to investigate the effects of static stretching of antagonist musculature on multiple strength and power measures. Sixteen trained men were tested for vertical jump height and isokinetic peak torque production during knee extension at 60°.s (SlowKE) and 300°.s (FastKE). Electromyography was recorded for the vastus lateralis and the biceps femoris muscles during isokinetic knee extension. Subjects performed these tests in a randomized counterbalanced order with and without prior stretching of the antagonist musculature. Paired samples t-tests indicated significantly greater torque production during the FastKE when preceded by stretching of the antagonist musculature vs. the nonstretch trial (102.2 vs. 93.5 N.m; p = 0.032). For SlowKE, torque production was not significantly different between the trials (176.7 vs. 162.9 N.m; p = 0.086). Vertical jump height (59.8 vs. 58.6 cm; p = 0.011) and power (8571 vs. 8487 W; p = 0.005) were significantly higher after the stretching trial vs. the nonstretching trial. Electromyography responses were similar between the trials. These results suggest that static stretching of the antagonist hamstrings before high-speed isokinetic knee extension increases the torque production. Furthermore, stretching the hip flexors (emphasis on single-joint hip flexors) and dorsiflexors, the antagonists of the hip extensors and plantarflexors, may enhance jump height and power, although the effect sizes were small.

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  • Authors+Show Affiliations

    ,

    Human Movement Science Program, Department of Health, Physical Education, and Recreation, Utah State University, Logan, Utah, USA.

    , ,

    Source

    MeSH

    Adolescent
    Adult
    Electromyography
    Humans
    Knee Joint
    Male
    Movement
    Muscle Strength
    Muscle Stretching Exercises
    Muscle, Skeletal
    Thigh
    Torque
    Young Adult

    Pub Type(s)

    Journal Article
    Randomized Controlled Trial
    Research Support, Non-U.S. Gov't

    Language

    eng

    PubMed ID

    22344065

    Citation

    Sandberg, John B., et al. "Acute Effects of Antagonist Stretching On Jump Height, Torque, and Electromyography of Agonist Musculature." Journal of Strength and Conditioning Research, vol. 26, no. 5, 2012, pp. 1249-56.
    Sandberg JB, Wagner DR, Willardson JM, et al. Acute effects of antagonist stretching on jump height, torque, and electromyography of agonist musculature. J Strength Cond Res. 2012;26(5):1249-56.
    Sandberg, J. B., Wagner, D. R., Willardson, J. M., & Smith, G. A. (2012). Acute effects of antagonist stretching on jump height, torque, and electromyography of agonist musculature. Journal of Strength and Conditioning Research, 26(5), pp. 1249-56. doi:10.1519/JSC.0b013e31824f2399.
    Sandberg JB, et al. Acute Effects of Antagonist Stretching On Jump Height, Torque, and Electromyography of Agonist Musculature. J Strength Cond Res. 2012;26(5):1249-56. PubMed PMID: 22344065.
    * Article titles in AMA citation format should be in sentence-case
    TY - JOUR T1 - Acute effects of antagonist stretching on jump height, torque, and electromyography of agonist musculature. AU - Sandberg,John B, AU - Wagner,Dale R, AU - Willardson,Jeffrey M, AU - Smith,Gerald A, PY - 2012/2/21/entrez PY - 2012/2/22/pubmed PY - 2012/9/13/medline SP - 1249 EP - 56 JF - Journal of strength and conditioning research JO - J Strength Cond Res VL - 26 IS - 5 N2 - Although there has been substantial research on the acute effects of static stretching on subsequent force and power development, the outcome after stretching of the antagonist musculature has not been examined. The purpose of this study was to investigate the effects of static stretching of antagonist musculature on multiple strength and power measures. Sixteen trained men were tested for vertical jump height and isokinetic peak torque production during knee extension at 60°.s (SlowKE) and 300°.s (FastKE). Electromyography was recorded for the vastus lateralis and the biceps femoris muscles during isokinetic knee extension. Subjects performed these tests in a randomized counterbalanced order with and without prior stretching of the antagonist musculature. Paired samples t-tests indicated significantly greater torque production during the FastKE when preceded by stretching of the antagonist musculature vs. the nonstretch trial (102.2 vs. 93.5 N.m; p = 0.032). For SlowKE, torque production was not significantly different between the trials (176.7 vs. 162.9 N.m; p = 0.086). Vertical jump height (59.8 vs. 58.6 cm; p = 0.011) and power (8571 vs. 8487 W; p = 0.005) were significantly higher after the stretching trial vs. the nonstretching trial. Electromyography responses were similar between the trials. These results suggest that static stretching of the antagonist hamstrings before high-speed isokinetic knee extension increases the torque production. Furthermore, stretching the hip flexors (emphasis on single-joint hip flexors) and dorsiflexors, the antagonists of the hip extensors and plantarflexors, may enhance jump height and power, although the effect sizes were small. SN - 1533-4287 UR - https://www.unboundmedicine.com/medline/citation/22344065/full_citation/Acute_Effects_of_Antagonist_Stretching_on_Jump_Height_Torque_and_Electromyography_of_Agonist_Musculature_ L2 - http://Insights.ovid.com/pubmed?pmid=22344065 DB - PRIME DP - Unbound Medicine ER -