The influence of muscle length on the fatigue-related reduction in joint range of motion of the human dorsiflexors.

European Journal of Applied Physiology
Arthur J ChengCharles L Rice

Abstract

The fatigue-related reduction in joint range of motion (ROM) during dynamic contraction tasks may be related to muscle length-dependent alterations in torque and contractile kinetics, but this has not been systematically explored previously. Twelve young men performed a repetitive voluntary muscle shortening contraction task of the dorsiflexors at a contraction load of 30% of maximum voluntary isometric contraction (MVC) torque, until total 40 degrees ROM had decreased by 50% at task failure (POST) to 20 degrees ROM. At both a short (5 degrees dorsiflexion) and long muscle length (35 degrees plantar flexion joint angle relative to a 0 degrees neutral ankle joint position), voluntary activation, MVC torque, and evoked tibialis anterior contractile properties of a 52.8 Hz high-frequency isometric tetanus [peak evoked torque, maximum rate of torque development (MRTD), maximum rate of relaxation (MRR)] were evaluated at baseline (PRE), at POST, and up to 10 min of recovery. At POST, we measured similar fatigue-related reductions in torque (voluntary and evoked) and slowing of contractile kinetics (MRTD and MRR) at both the short and long muscle lengths. Thus, the fatigue-related reduction in ROM could not be explained by length-dep...Continue Reading

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Citations

May 15, 2013·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·Arthur J Cheng, Charles L Rice
Dec 12, 2012·The Journal of Physiology·Christian FroydTimothy D Noakes
Jun 15, 2011·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·Kim Hébert-LosierGuy G Simoneau
Jul 17, 2015·Journal of Motor Behavior·Daniel NiedererWinfried Banzer
Jul 1, 2015·International Journal of Orthopaedic and Trauma Nursing·Sandra FlynnRebecca Jester
Sep 8, 2016·International Journal of Occupational Safety and Ergonomics : JOSE·Teimour AllahyariHamid-Reza Khalkhali
Nov 21, 2015·The Open Orthopaedics Journal·Grace CoutureBrian M Hatzel
Jul 12, 2016·The Open Orthopaedics Journal·Siamak Bashardoust TajaliChris Young
Jan 16, 2016·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Joaquin CalatayudLars L Andersen
Jun 14, 2014·International Journal of Shoulder Surgery·Leenesh KhadilkarGeorge S Athwal

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