Healthy humans use sex-specific co-ordination patterns of trunk muscles during gait |
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| Authors: | C. Anders H. Wagner C. Puta R. Grassme H. C. Scholle |
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| Affiliation: | 1.Clinic for Trauma-, Hand- and Reconstructive Surgery, Division for Motor Research, Pathophysiology and Biomechanics, University Hospital,Friedrich-Schiller-University Jena,Jena,Germany;2.Department of Motion Science, Institute of Sport Science,Westf?lische Wilhelms-Universtit?t Münster,Münster,Germany;3.Chair for Sports Medicine, Institute for Sports Sciences,Friedrich-Schiller-University Jena,Jena,Germany;4.Berufsgenossenschaft Nahrungsmittel & Gastst?tten (BGN),Aussenstelle Erfurt,Erfurt,Germany |
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| Abstract: | Human gait patterns differ considerably between the sexes. Therefore sex specific trunk muscle activation patterns can be
expected. Healthy volunteers of both sexes (51 women, 55 men) walked on a treadmill at speeds from 2 to 6 km/h. Surface electormyography
was recorded from five pairs of trunk muscles. Grand averaged root mean square (rms) curves and amplitude normalised curves
were calculated. Mean amplitudes and relative amplitudes were calculated as well. Mean amplitudes as well as relative amplitude
levels were not generally sex specific, but differed for single muscles. Grand averaged rms curves of all investigated muscles
differed between sexes. At low walking speeds, differences mostly originated from mean amplitude level differences, alternating
between sexes. At higher walking speeds, amplitude curves became more phasic, differences again alternated between sexes.
Therefore, trunk muscle co-ordination during gait is sex-specific. Any interpretation of trunk muscle co-ordination patterns
during gait requires sex specific normatives. |
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| Keywords: | Gait analysis Electromyography Trunk muscles Muscle co-ordination Sex differences |
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