Characteristics of torque production of the lower limb are significantly altered after 2 hours of treadmill load carriage

Scales, J., Coleman, D. A., O'Driscoll, J. and Brown, Mathew (2018) Characteristics of torque production of the lower limb are significantly altered after 2 hours of treadmill load carriage. Translational Sports Medicine, 2 (1). ISSN 2573-8488.

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Abstract

Load carriage is seldom completed in isolation, meaning load bearers need to be physically capable of physical activity after the load carriage task.

This study aims to examine changes in lower limb muscle strength, as measured by torque production across a range of joint angles as a result of prolonged load carriage. Thirty-four healthy participants underwent two hours of loaded or unloaded treadmill load carriage, with lower limb muscle function variables assessed pre and post activity. The loaded group had a mass of (Mean(range)) 76.45 (27.12)kg, stature: 178.56 (17.63)cm, age: 23(6)yrs, and comprised of 13 males and 3 females. While the unloaded group had a body mass of 73.69(24.19)kg, stature: 178.89(18.49)cm, age: 22(5)yrs and comprised of 14 males and 4 females. Significant reductions across a range of parameters were observed. Characterised by reductions at the optimum muscle length for torque output, with all aspects demonstrating large (knee extension at 180˚·s-1: 0.51 Standardised SD, knee extnsion at 60˚·s-1: 0.98 standardised SD) or extremely large individual differences (knee flexion at 180˚·s-1: 2.17 standardised SD).

These findings suggest after the completion of the load carriage task participants are in a significantly reduced physical state, which may have implications for secondary tasks.

Item Type: Article
Uncontrolled Keywords: Joint angle; muscle length; torque curve; prolonged exercise; military
Subjects: G Geography. Anthropology. Recreation > GV Recreation Leisure > GV0558 Sports science
Q Science > QP Physiology > QP0001 General
R Medicine > RC Internal medicine > RC1200 Sports medicine
U Military Science
U Military Science > U Military Science (General)
Divisions: Faculty of Arts and Humanities > School of Language Studies and Applied Linguistics
Depositing User: Dr Mathew Brown
Date Deposited: 11 Jan 2019 09:24
Last Modified: 07 Feb 2019 15:31
URI: https://create.canterbury.ac.uk/id/eprint/17747

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Last edited: 29/06/2016 12:23:00