Sit-to-walk and sit-to-stand-and-walk task dynamics are maintained during rising at an elevated seat-height independent of lead-limb in healthy individuals

Journal article


Jones, GD, James, DC, Thacker, M, Jones, EJ and Green, DA (2016). Sit-to-walk and sit-to-stand-and-walk task dynamics are maintained during rising at an elevated seat-height independent of lead-limb in healthy individuals. Gait and Posture. 48 (July), pp. 226 - 229. https://doi.org/10.1016/j.gaitpost.2016.06.005
AuthorsJones, GD, James, DC, Thacker, M, Jones, EJ and Green, DA
Abstract

© 2016 Elsevier B.V.Introduction: Sit-to-walk (STW) is a common transitional motor task not usually included in rehabilitation. Typically, sit-to-stand (STS), pause, then gait initiation (GI) before walking is used, which we term sit-to-stand-and-walk (STSW). Separation between centre-of-pressure (COP) and whole-body centre-of-mass (BCOM) during GI is associated with dynamic postural stability. Rising from seats higher than knee-height (KH) is more achievable for patients, but whether this and/or lead-limb significantly affects task dynamics is unclear. This study tested whether rising from seat-heights and lead-limb affects STW and STSW task dynamics in young healthy individuals. Methods: Ten (5F) young (29 ± 7.7 years) participants performed STW and STSW from a standardised position. Five trials of each task were completed at 100 and 120%KH leading with dominant and non-dominant legs. Four force-plates and optical motion capture delineated key movement events and phases with effect of seat-height and lead-limb determined by 2-way ANOVA within tasks. Results: At 120%KH, lower peak vertical ground-reaction-forces (vGRFs) and vertical BCOM velocities were observed during rising irrespective of lead-limb. No other parameters differed between seat-heights or lead-limbs. During GI in STSW there was more lateral, and less posterior, COP excursion than expected. Conclusion: Reduction in vGRFs and velocity during rising at 120%KH is consistent with reduced effort in young healthy individuals and is likely therefore to be an appropriate seat-height for patients. Lead-limb had no effect upon STSW or STW parameters suggesting that normative data independent of lead-limb can be utilised to monitor motor rehabilitation should differences be observed in patients. STSW should be considered an independent movement transition.

Year2016
JournalGait and Posture
Journal citation48 (July), pp. 226 - 229
PublisherElsevier
ISSN0966-6362
Digital Object Identifier (DOI)https://doi.org/10.1016/j.gaitpost.2016.06.005
Publication dates
Print07 Jun 2016
Publication process dates
Deposited30 Aug 2016
Accepted06 Jun 2016
Accepted author manuscript
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Open
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