Sitting balance II

Reach direction and thigh support affect the contribution of the lower limbs when reaching beyond arm's length in sitting

Catherine M. Dean*, Roberta B. Shepherd, Roger D. Adams

*Corresponding author for this work

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

The effects of reach direction and extent of thigh support on the contribution of the lower limbs during seated reaching were examined. Twelve healthy subjects aged 59-79 years performed self-paced reaching forwards and diagonally to both sides and under three thigh support conditions. Vertical ground reaction forces (GRF) and leg muscle activity were monitored bilaterally. Reach direction affected both the magnitude of peak vertical GRF and the relative distribution of vertical GRF through the feet, demonstrating that the lower limbs work cooperatively to control the motion of the body mass. Extent of thigh support also affected the magnitude of peak vertical GRF through the feet. In addition, the EMG data confirmed the active contribution of the lower limbs when reaching beyond arm's length, with muscles in both lower limbs activated in all trials. Copyright (C) 1999 Elsevier Science B.V.

Original languageEnglish
Pages (from-to)147-153
Number of pages7
JournalGait and Posture
Volume10
Issue number2
DOIs
Publication statusPublished - Oct 1999
Externally publishedYes

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