Cross-education of wrist extensor strength is not influenced by non-dominant training in right-handers

Timothy A. Coombs, Ashlyn K. Frazer, Deanna M. Horvath, Alan J. Pearce, Glyn Howatson, Dawson J. Kidgell

Research output: Contribution to journalArticleResearchpeer-review

28 Citations (Scopus)

Abstract

Purpose: Cross-education of strength has been proposed to be greater when completed by the dominant limb in right handed humans. We investigated whether the direction of cross-education of strength and corticospinal plasticity are different following right or left limb strength training in right-handed participants. Methods: Changes in strength, muscle thickness and indices of corticospinal plasticity were analyzed in 23 adults who were exposed to 3-weeks of either right-hand strength training (RHT) or left-hand strength training (LHT). Results: Maximum voluntary wrist extensor strength in both the trained and untrained limb increased, irrespective of which limb was trained, with TMS revealing reduced corticospinal inhibition. Conclusions: Cross-education of strength was not limited by which limb was trained and reduced corticospinal inhibition was not just confined to the trained limb. Critically, from a behavioral perspective, the magnitude of cross-education was not limited by which limb was trained.

Original languageEnglish
Pages (from-to)1757-1769
Number of pages13
JournalEuropean Journal of Applied Physiology
Volume116
Issue number9
DOIs
Publication statusPublished - 1 Sep 2016

Keywords

  • Cross-education
  • Directionality
  • Short-interval intracortical inhibition
  • Silent period
  • Strength
  • Transcranial magnetic stimulation

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