Functional comparison of pronation and supination strengths.

W. N. Timm, S. W. O'Driscoll, M. E. Johnson, K. N. An

Research output: Contribution to journalArticle

26 Scopus citations


Studies have shown that functional activities involving pronation and supination, such as turning a doorknob or a screwdriver, involve wrist positions of extension and/or ulnar deviation. Previous studies of isometric forearm pronation and supination strength have utilized a neutral wrist position, resulting in a possible underestimation of true functional strength. Twenty healthy subjects between the ages of 24 and 45 years were assessed for isometric pronation and supination strength using cylinder, screwdriver, and doorknob handle adaptations. Maximal strength in both pronation and supination was observed with the use of the doorknob handle. Although pronation strength was exceeded by supination strength within all three handle adaptations, the difference was statistically significant for the screwdriver and doorknob handles. The results suggest that in clinical and research-oriented testing of maximal forearm rotation strength, further consideration must be given to the terminal grip device and positioning of the wrist.

Original languageEnglish (US)
Pages (from-to)190-193
Number of pages4
JournalJournal of hand therapy : official journal of the American Society of Hand Therapists
Issue number3
StatePublished - Jul 1993


ASJC Scopus subject areas

  • Orthopedics and Sports Medicine

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