Consistency of leg extension power assessments in older men: The osteoporotic fractures in men (MrOS) study

Terri Blackwell, Peggy M. Cawthon, Lynn M. Marshall, Richard Brand

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

This study examined the consistency of the Nottingham power rig in assessing leg extension power in older men, assessed between different examiners with adjustment for the order of measurement (time) and clinic. Fifty-five men (mean, 73 yrs) enrolled in the Osteoporotic Fractures in Men Study had maximum leg extension power of each leg measured at baseline and remeasured 1 wk later. There was a significant effect of time (P < 0.01). The second visit had an average increase in leg extension power (right leg, 14.2 W; left leg, 16.5 W). After accounting for the effect of time, a low coefficient of variation was observed between examiners (right leg 3.49%; left leg 3.46%). Data from the two time points corresponded reasonably well. The effect of time and fatigue should be considered when performing this measurement. The Nottingham power rig provided a reproducible measure of leg extension power in this multisite study of older men.

Original languageEnglish (US)
Pages (from-to)934-940
Number of pages7
JournalAmerican Journal of Physical Medicine and Rehabilitation
Volume88
Issue number11
DOIs
StatePublished - Nov 1 2009

Keywords

  • Leg extension power
  • Muscle
  • Reliability
  • Strength

ASJC Scopus subject areas

  • Physical Therapy, Sports Therapy and Rehabilitation
  • Rehabilitation

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