000 02246 am a22002413u 4500
042 _adc
100 1 0 _aJahanian, Omid
_eauthor
_9437
700 1 0 _aSchnorenberg, Alyssa J
_eauthor
_9438
700 1 0 _aMuqeet, Vaishnavi
_eauthor
_9439
700 1 0 _aHsiao-Wecksler, Elizabeth T.
_eauthor
_9440
700 1 0 _aSlavens, Brooke A.
_eauthor
_9441
245 0 0 _aGlenohumeral joint dynamics and shoulder muscle activity during geared manual wheelchair propulsion on carpeted floor in individuals with spinal cord injury
260 _c2022-02.
500 _a/pmc/articles/PMC6885114/
500 _a/pubmed/31178393
520 _aThis study investigated the effects of using geared wheels on glenohumeral joint dynamics and shoulder muscle activity during manual wheelchair propulsion. Seven veterans with spinal cord injury propelled their wheelchairs equipped with geared wheels over a carpeted floor in low gear (1.5:1) and standard gear (1:1) conditions. Hand-rim kinetics, glenohumeral joint dynamics, and muscle activity were measured using a custom instrumented geared wheel, motion analysis, and surface electromyography. Findings indicated that the propulsion speed and stroke distance decreased significantly during the low gear condition. The peak hand-rim resultant force and propulsive moment, as well as the peak glenohumeral inferior force and flexion moment, were significantly less during the low gear condition. The peak and integrated muscle activity of the anterior deltoid and pectoralis major decreased significantly, while the normalized integrated muscle activity (muscle activity per stroke distance) was not significantly different between the two conditions. Propulsion on carpeted floor in the low gear condition was accompanied by a reduced perception of effort. The notable decrease in the peak shoulder loading and muscle activity suggests that usage of geared wheels may be beneficial for wheelchair users to enhance independent mobility in their homes and communities while decreasing their shoulder demands.
540 _a
546 _aen
690 _aArticle
655 7 _aText
_2local
786 0 _nJ Electromyogr Kinesiol
856 4 1 _uhttp://dx.doi.org/10.1016/j.jelekin.2019.05.019
_zConnect to this object online.
999 _c1294
_d1294