The influence of isokinetic dynamometer configuration on eccentric hamstring strength metrics: Implications for testing and training

Rebecca Brown, MATT GREIG

Research output: Contribution to journalArticle (journal)peer-review

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Abstract

Isokinetic dynamometry is the clinical gold standard for strength assessment but testing protocols and outcome metrics can lack functional relevance. To quantify the influence of dynamometer configuration on eccentric hamstring strength metrics, 23 trained participants completed isokinetic eccentric knee flexor trials at 180º·s-1 in a seated and extended hip position. The extended position elicited greater peak torque (P=0.04) which was achieved at a significantly (P<0.001) greater degree of knee flexion. Isokinetic range and functional range (defined as 85% of peak torque) were consistent at ~44º and ~21º respectively across trials, but were achieved with a more flexed knee in the extended hip configuration. Therefore, whilst the extended hip configuration might better reflect the bi-articular nature of the hamstring musculature and the mechanism of hamstring strain injury, the sensitivity of strength metrics to configuration has implications for clinical assessment and training adaptations.
Original languageEnglish
JournalResearch in Sports Medicine
Early online date31 May 2022
DOIs
Publication statusE-pub ahead of print - 31 May 2022

Keywords

  • isokinetic dynamometer
  • eccentric hamstring
  • strength curve
  • isokintetic testing
  • eccentric exercise
  • hamstrings
  • rehabilitation

Research Groups

  • Sports Injuries Research Group

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