Abstract
This study investigated age-related changes in trunk muscle function in healthy men and the moderating effect of physical activity. 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-180°/s) and contractile modes (concentric and eccentric). For concentric trunk extension, mixed-effects analysis of covariance revealed a significant interaction between Angular velocity × Age group (p = .026) controlling for physical activity. Follow-up univariate analysis of covariance 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 physical activity. 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 language | English |
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Pages (from-to) | 941-951 |
Number of pages | 11 |
Journal | Journal of Aging and Physical Activity |
Volume | 29 |
Early online date | 30 Apr 2021 |
DOIs | |
Publication status | Published - 1 Dec 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