Pronation-supination torque and associated electromyographic activity varies during a sustained elbow flexor contraction but does not influence the time to task failure

Didier Staudenmann; Thorsten Rudroff; Roger M Enoka

doi:10.1002/mus.21224

Back

Pronation-supination torque and associated electromyographic activity varies during a sustained elbow flexor contraction but does not influence the time to task failure

Journal article

Peer reviewed

Pronation-supination torque and associated electromyographic activity varies during a sustained elbow flexor contraction but does not influence the time to task failure

Didier Staudenmann, Thorsten Rudroff and Roger M Enoka

Muscle & nerve, Vol.40(2), pp.231-239

08/2009

DOI: 10.1002/mus.21224

PMCID: PMC2758423

PMID: 19358235

View Online

Abstract

In this study we measured the pronation-supination torque, flexion force, and electromyographic activity in elbow flexor muscles during an isometric contraction in which a submaximal elbow flexion force was kept constant for as long as possible. Ten subjects performed the contraction at 20% of maximal voluntary contraction (MVC) torque until failure. Electromyographic (EMG) activity of the long and short heads of biceps brachii, brachialis, brachioradialis, and triceps brachii was recorded with surface and intramuscular electrodes. The mean time to failure was 8.2 +/- 6.2 min. The fluctuations in flexion force and pronation-supination torque were correlated (r range = 0.68-0.92), and subjects exhibited a range of pronation-torque profiles that were not associated with the time to failure. Knowing the influence of concurrent actions about the pronation-supination axis during a submaximal fatiguing contraction with the elbow flexor muscles has implications for the design of workstations in ergonomic settings and in the prescription of activities for rehabilitation programs. Muscle Nerve 40: 231-239, 2009.

Torque

Reflex - physiology

Humans

Male

Muscle, Skeletal - physiology

Pronation - physiology

Supination - physiology

Analysis of Variance

Time Factors

Muscle Contraction - physiology

Adult

Elbow - physiology

Electromyography

Electric Stimulation - methods

Details

Title: Subtitle: Pronation-supination torque and associated electromyographic activity varies during a sustained elbow flexor contraction but does not influence the time to task failure
Creators: Didier Staudenmann - Department of Integrative Physiology, University of Colorado, Boulder, Colorado 80309-0354, USA
Thorsten Rudroff
Roger M Enoka
Resource Type: Journal article
Publication Details: Muscle & nerve, Vol.40(2), pp.231-239
DOI: 10.1002/mus.21224
PMID: 19358235
PMCID: PMC2758423
NLM abbreviation: Muscle Nerve
ISSN: 0148-639X
eISSN: 1097-4598
Publisher: Wiley; United States
Grant note: NS043275 / NINDS NIH HHS R01 NS043275 / NINDS NIH HHS R01 NS043275-07 / NINDS NIH HHS
Language: English
Date published: 08/2009
Academic Unit: Neurology; Health, Sport, and Human Physiology
Record Identifier: 9984002344502771

Metrics

32 Record Views

11 Times Cited - Web of Science

See more details