Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/43982
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dc.contributorDepartment of Rehabilitation Sciencesen_US
dc.creatorLiao, LRen_US
dc.creatorNg, GYFen_US
dc.creatorJones, AYMen_US
dc.creatorChung, RCKen_US
dc.creatorPang, MYCen_US
dc.date.accessioned2016-06-07T06:37:33Z-
dc.date.available2016-06-07T06:37:33Z-
dc.identifier.issn0031-9023en_US
dc.identifier.urihttp://hdl.handle.net/10397/43982-
dc.language.isoenen_US
dc.publisherOxford University Pressen_US
dc.rights© 2015 American Physical Therapy Associationen_US
dc.rightsThis is a pre-copyedited, author-produced version of an article accepted for publication in Physical Therapy following peer review. The version of record Lin-Rong Liao, Gabriel Y.F. Ng, Alice Y.M. Jones, Raymond C.K. Chung, Marco Y.C. Pang, Effects of Vibration Intensity, Exercise, and Motor Impairment on Leg Muscle Activity Induced by Whole-Body Vibration in People With Stroke, Physical Therapy, Volume 95, Issue 12, 1 December 2015, Pages 1617–1627 is available online at: https://doi.org/10.2522/ptj.20140507.en_US
dc.titleEffects of vibration intensity, exercise, and motor impairment on leg muscle activity induced by whole-body vibration in people with strokeen_US
dc.typeJournal/Magazine Articleen_US
dc.identifier.spage1617en_US
dc.identifier.epage1627en_US
dc.identifier.volume95en_US
dc.identifier.issue12en_US
dc.identifier.doi10.2522/ptj.20140507en_US
dcterms.abstractBackground. Whole-body vibration (WBV) has increasingly been used as an adjunct treatment in neurological rehabilitation. However, how muscle activation level changes during exposure to different WBV protocols in individuals after stroke remains understudied. Objective. The purpose of this study was to examine the influence of WBV intensity on the magnitude of biceps femoris (BF) and tibialis anterior (TA) muscle activity and its interaction with exercise and with severity of motor impairment and spasticity among individuals with chronic stroke. Methods. Each of the 36 individuals with chronic stroke (mean age 57.3 years, SD 10.7) performed 8 different static exercises under 3 WBV conditions: (1) no WBV, (2) low-intensity WBV (frequency 20 Hz, amplitude 0.60 mm, peak acceleration 0.96g), and (3) high- intensity WBV (30 Hz, 0.44 mm, 1.61g). The levels of bilateral TA and BF muscle activity were recorded using surface electromyography (EMG). Results. The main effect of intensity was significant. Exposure to the low-intensity and high-intensity protocols led to a significantly greater increase in normalized BF and TA muscle electromyographic magnitude in both legs compared with no WBV. The intensity exercise interaction also was significant, suggesting that the WBV-induced increase in EMG activity was exercise dependent. The EMG responses to WBV were similar between the paretic and nonparetic legs and were not associated with level of lower extremity motor impairment and spasticity. Limitations. Leg muscle activity was measured during static exercises only. Conclusions. Adding WBV during exercise significantly increased EMG activity in the TA and BF muscles. The EMG responses to WBV in the paretic and nonparetic legs were similar and were not related to degree of motor impairment and spasticity. The findings are useful for guiding the design of WBV training protocols for people with stroke.en_US
dcterms.accessRightsopen accessen_US
dcterms.bibliographicCitationPhysical therapy, 1 Dec. 2015, v. 95, no. 12, p. 1617-1627en_US
dcterms.isPartOfPhysical therapyen_US
dcterms.issued2015-12-01-
dc.identifier.scopus2-s2.0-84949256715-
dc.identifier.eissn1538-6724en_US
dc.identifier.rosgroupid2015001542-
dc.description.ros2015-2016 > Academic research: refereed > Publication in refereed journalen_US
dc.description.oaAccepted Manuscripten_US
dc.identifier.FolderNumbera0590-n12-
dc.identifier.SubFormID336-
dc.description.fundingSourceRGCen_US
dc.description.fundingTextP0004292en_US
dc.description.pubStatusPublisheden_US
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