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Int J Sports Med 1994; 15: S60-S63
DOI: 10.1055/s-2007-1021112
© Georg Thieme Verlag Stuttgart · New York

Contraction Patterns During Isokinetic Eccentric and Concentric Contractions After Anterior Cruciate Ligament Injury

A. Verdonck1 , I. Froböse2 , U. Hardelauf2 , C. Güttge2
  • 1Department of Biokinetics, Krankenhaus für Sportverletzte Hellersen, Lüdenscheid, Germany
  • 2Department of Rehabilitation and Sports for the Handicapped, Deutsche Sporthochschule Köln, Germany
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Publication History

Publication Date:
14 March 2008 (online)

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Abstract

Muscular fatigue was investigated in m.rectus femoris, m. vastus lateralis and medialis of 15 patients after an anterior cruciate ligament injury. Using a Lido active (isokinetic) dynamometer, combined eccentric and concentric contractions were carried out at intermediate contractile velocity speeds (150°, 240°/s). In addition, concentric contractions were also performed at fast angular velocities (300°, 400°/s). The results indicated that fatigue was significantly greater for the intermediate speeds. Given one angular velocity, the average eccentric force decline was more pronounced than the concentric one. At all velocities the relative decrease of peak torque (PT) was smaller than for contractional work (CW).

Key words

Isokinetic - electromyography - fatigue - eccentric - stretch-shortening cycle - rehabilitation