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Torque-angle relationship are better preserved during eccentric compared to concentric contractions in patients with stroke
Umea Univ, Dept Community Med & Rehabil, SE-90187 Umea, Sweden.
Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences.
Umea Univ, Dept Publ Hlth & Clin Med, SE-90187 Umeå, Sweden.
Umea Univ, Dept Community Med & Rehabil, SE-90187 Umea, Sweden.
2012 (English)In: Isokinetics and exercise science, ISSN 0959-3020, Vol. 20, no 2, 129-140 p.Article in journal (Refereed) Published
Abstract [en]

The aim of this study was to compare the effect of isokinetic contraction mode and velocity on the torque-angle relationship during maximum voluntary elbow flexion in patients with stroke, age-matched healthy subjects and young subjects. To eliminate the effect of torque amplitude differences between subjects and groups, the torque values throughout the ROM were individually normalized to the peak value for each contraction velocity. The results indicate that in stroke patients the normalized torque angle relationship during the eccentric contractions was better preserved than during concentric contractions. Specifically, during eccentric contractions, stroke patients exhibited a torque-angle relationship that was closer to normal as the test velocity increased. The opposite trend could be seen in concentric contractions where the torque-angle relationship became more divergent from normal with a rise in the velocity. The torque-angle relationships were essentially the same for the control groups, irrespective of contraction mode or velocity. These findings may have significance for loading patterns of resistance training exercises used with stroke patients as such exercises normally are biomechanically designed for normal torque angle relationships. In clinical practice, these findings may partly explain why the strength increases due to resistance training are limited for patients with stroke.

Place, publisher, year, edition, pages
2012. Vol. 20, no 2, 129-140 p.
Keyword [en]
Elbow, concentric, eccentric, strength, torque-angle relationship, resistance training
National Category
Health Sciences
Identifiers
URN: urn:nbn:se:miun:diva-17075DOI: 10.3233/IES-2012-0455ISI: 000305152100009Scopus ID: 2-s2.0-84862981567OAI: oai:DiVA.org:miun-17075DiVA: diva2:556897
Available from: 2012-09-26 Created: 2012-09-26 Last updated: 2012-09-26Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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