Knee extensor fatigue resistance of young and older men and women performing sustained and brief intermittent isometric contractions

MCPHEE, Jamie S, MADEN-WILKINSON, Tom, NARICI, Marco V, JONES, David A and DEGENS, Hans (2014). Knee extensor fatigue resistance of young and older men and women performing sustained and brief intermittent isometric contractions. Muscle & Nerve, 50 (3), 393-400.

Full text not available from this repository.
Official URL: http://onlinelibrary.wiley.com/doi/10.1002/mus.241...
Link to published version:: 10.1002/mus.24174

Abstract

INTRODUCTION Susceptibility to muscle fatigue during aging could depend on muscle activation patterns. METHODS Young (mean age, 22 years) and older (mean age 70 years) men and women completed two fatigue tests of knee extensor muscles using voluntary and electrically stimulated contractions. RESULTS Older subjects displayed a shift to the left of the torque-frequency relationship and held a sustained voluntary isometric contraction at 50% maximal strength for significantly longer than young (P < 0.001). Young and old showed similar fatigue during electrically induced, intermittent isometric contractions (1-s on, 1-s off for 2 min), but women fatigued less than men (P = 0.001). Stronger muscles fatigued more quickly, and slower contractile properties were associated with longer sustained contractions. CONCLUSIONS The slowing and weakness of older muscle was associated with superior fatigue resistance during sustained isometric contractions. Young and old showed similar fatigue following a series of brief, intermittent contractions, but women fatigued less than men.

Item Type: Article
Research Institute, Centre or Group: Centre for Sport and Exercise Science
Identification Number: 10.1002/mus.24174
Depositing User: Tom Maden-Wilkinson
Date Deposited: 10 Jan 2018 16:25
Last Modified: 15 Jan 2018 14:32
URI: http://shura.shu.ac.uk/id/eprint/17530

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year

View more statistics