Age-related changes in concentric and eccentric isokinetic peak torque of the trunk muscles in healthy older versus younger men

Alexander David Francis Dallaway, John Hattersley, Jason Tallis, Derek Renshaw, Corbin Griffen, Michael Duncan

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    Abstract

    This study investigated age-related changes in trunk muscle function in healthy men and the moderating effect of physical activity (PA).
    Twelve older (67.3±6.0 years) and 12 younger (24.7±3.1 years) men performed isokinetic trunk flexion and extension tests across a range of angular velocities (15°·s-1 - 180°·s-1) and contractile modes (concentric and eccentric).
    For concentric trunk extension, mixed-effects ANCOVA revealed a significant interaction between angular velocity x age group (p=.026) controlling for PA. Follow-up univariate ANCOVA revealed that the younger group produced significantly greater peak torque for all concentric extension conditions. Eccentric trunk strength was somewhat preserved in the older group. Age-related changes in trunk strength were independent of PA.
    The normal loss of trunk muscle strength in older age is muscle and contractile mode specific. These findings provide guidance for effective intervention strategies to offset adverse health outcomes related to trunk strength loss in older adults.
    Original languageEnglish
    Pages (from-to)(In-press)
    JournalJournal of Aging and Physical Activity
    Volume(In-press)
    Early online date2021
    DOIs
    Publication statusE-pub ahead of print - 2021

    Bibliographical note

    Accepted author manuscript version reprinted, by permission, from Journal of Aging and Physical Activity, 2021, https://doi.org/10.1123/japa.2020-0421 © Human Kinetics, Inc.

    Copyright © and Moral Rights are retained by the author(s) and/ or other copyright owners. A copy can be downloaded for personal non-commercial research or study, without prior permission or charge. This item cannot be reproduced or quoted extensively from without first obtaining permission in writing from the copyright holder(s). The content must not be changed in any way or sold commercially in any format or medium without the formal permission of the copyright holders.

    Keywords

    • muscle strength
    • ageing
    • sarcopenia
    • abdominal muscles
    • paravertebral muscles

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