Semnan University of Medical Sciences

Research and Technology Vice Chancellor

Mohammadi, Roghayeh and Rahnama, Leila and Safavi-Farokhi, Ziaeddin (2016) Effects of different walking speed on ankle muscle onset timing in middle-aged healthy adults. Koomesh. pp. 258-264.

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    Introduction: Plantarflexor muscles produce propulsive force in the second half of stance phase; deficient motor output from these muscles would lead to inadequate propulsion at push off and decreasing walking speed. This study has examined the effects of walking on a treadmill at varying gradients and speeds on ankle muscle timing in healthy middle-aged adults. Materials and Methods: Fifteen healthy middle-aged adults (10M/5F; average age 56.53±7.20 years; body mass index 28.52±3.70 kg/m2) participated in the study. Participants walked on a standard treadmill at three different walking speeds (self-selected, self-selected+20%, self-selected+40%) and positive inclines (0°, 3°, and 6°). The onset muscle timing of MedialGastrocnemius (MG), and Tibialis Anterior (TA) muscles recorded at push off phase of the gait. Results: A linear mixed model (LMM) regression analysis was used to analysis. The onset of MG and TA muscles activity delayed at faster speeds on the nonodominant side (p<0.05). However, there is no changes with increasing treadmill speed and slope on muscles onset timing on the dominant side (p>0.05). Conclusion: Data showed that there is a bias towards using dominant side to overcome challenging walking conditions in middle-aged adults. Keywords: Electromyography, Exercise Test, Walking

    Item Type: Article
    Subjects: R Medicine > R Medicine (General)
    Divisions: Faculty of Medical Sciences > School of Medicine
    Depositing User: Mr Vahab Moshtaghi
    Date Deposited: 23 Apr 2017 14:42
    Last Modified: 23 Apr 2017 14:42

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