Unsupported eyes closed sitting and quiet standing share postural control strategies in healthy individuals.
The study aimed to (1) compare postural stability between sitting and standing in healthy individuals and (2) define center-of-pressure (COP) measures during sitting that could also explain standing stability. Fourteen healthy individuals randomly maintained (1) two short-sitting positions with eyes open or closed, with or without hand support, and (2) one standing position with eyes open with both upper limbs resting alongside the body. Thirty-six COP measures based on time and frequency series were computed. Greater COP displacement and velocity along with lower frequency measures were found for almost all directional components during standing compared with both sitting positions. The velocity, 95% confidence ellipse area, and centroidal frequency were found to be correlated between unsupported sitting and standing. Despite evidenced differences between sitting and standing, similarities in postural control were highlighted when sitting stability was the most challenging. These findings support further investigation between dynamic sitting and standing balance.
School of Rehabilitation, Université de Montreal, Montreal, Canada, and the Pathokinesiology Laboratory, Centre for Interdisciplinary Research in Rehabilitation of Greater Montreal-Institut de réadaptation Gingras-Lindsay-de-Montréal, Montreal, Canada.
Murielle
M
Grangeon
Cindy
C
Gauthier
Cyril
C
Duclos
Jean-Francois
JF
Lemay
Dany
D
Gagnon
D000328:Adult; D001696:Biomechanical Phenomena; D006801:Humans; D008297:Male; D008875:Middle Aged; D009068:Movement / Q000502:physiology*; D004856:Postural Balance / Q000502:physiology*; D011187:Posture / Q000502:physiology*; D012016:Reference Values; D055815:Young Adult