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    Assessing muscle-strength asymmetry via a unilateral-stance isometric midthigh pull

    Dos'Santos, T ORCID logoORCID: https://orcid.org/0000-0003-2715-0116, Thomas, C, Jones, PA and Comfort, P (2017) Assessing muscle-strength asymmetry via a unilateral-stance isometric midthigh pull. International Journal of Sports Physiology and Performance, 12 (4). pp. 505-511. ISSN 1555-0265

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    Abstract

    © 2017 Human Kinetics, Inc. Purpose: To investigate the within-session reliability of bilateral- and unilateral-stance isometric midthigh-pull (IMTP) force-time characteristics including peak force (PF), relative PF, and impulse at time bands (0-100, 0-200, 0-250, and 0-300 milliseconds) and to compare isometric force-time characteristics between right and left and dominant (D) and nondominant (ND) limbs. Methods: Professional male rugby league and multisport male college athletes (N = 54; age, 23.4 ± 4.2 y; height, 1.80 ± 0.05 m; mass, 88.9 ± 12.9 kg) performed 3 bilateral IMTP trials and 6 unilateral-stance IMTP trials (3 per leg) on a force plate sampling at 600 Hz. Results: Intraclass correlation coefficients (ICCs) and coefficients of variation (CVs) demonstrated high within-session reliability for bilateral and unilateral IMTP PF (ICC = .94, CV = 4.7-5.5%). Lower reliability measures and greater variability were observed for bilateral and unilateral IMTP impulse at time bands (ICC = .81-.88, CV = 7.7-11.8%). Paired-sample t tests and Cohen d effect sizes revealed no significant differences for all isometric force-time characteristics between right and left limbs in male college athletes (P >.05, d ≤ 0.32) and professional rugby league players (P > .05, d ≤ 0.11); however, significant differences were found between D and ND limbs in male college athletes (P < .001, d = 0.43-0.91) and professional rugby league players (P < .001, d = 0.27-0.46). Conclusion: This study demonstrated high within-session reliability for unilateral-stance IMTP PF, revealing significant differences in isometric force-time characteristics between D and ND limbs in male athletes.

    Item Type: Article
    Peer-reviewed: Yes
    Date Deposited: 19 Jun 2020 08:34
    Publisher: Human Kinetics
    Additional Information: This is an Author Accepted Manuscript of a paper accepted for publication in International Journal of Sports Physiology and Performance, published by and copyright Human Kinetics.
    Divisions: Faculties > Science and Engineering
    Subject terms: Muscle, Skeletal, Humans, Exercise Test, Reproducibility of Results, Isometric Contraction, Football, Adult, Male, Muscle Strength, Young Adult, Athletes, imbalance, impulse, peak force, reliability, Sport Sciences, 1106 Human Movement and Sports Sciences, 1116 Medical Physiology, 1701 Psychology
    URI: https://e-space.mmu.ac.uk/id/eprint/626024
    DOI: https://doi.org/10.1123/ijspp.2016-0179
    ISSN 1555-0265
    e-ISSN 1555-0273

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