title: Lower extremity preventive measures for slips - joint moments and myoelectric analysis.
abstract: This study investigated the lower extremity preventive measures for slips on simulated slippery surfaces in construction worksites. A total of 15 harnessed Chinese males walked without slips on a 5-m walkway in 16 simulated conditions 10 times at their natural cadence. Joint moments were calculated from kinetics, kinematics and anthropometric data recorded from a force plate, a Novel Pedar system and a motion analysis system. Data were evaluated from footstrike to mid-stance at 10%-stance intervals. Electromyography signals from tibialis anterior, gastrocnemius, rectus femoris and biceps femoris in one stride were evaluated in four phases, including early/late stance and swing. Results showed that lower extremity preventive measures for slips included prolonged ankle plantar flexion moments from 25% to 92% stance, increased ankle plantar flexion moments from 30% stance to mid-stance, and diminished knee extension moments from 10% to 30% stance. Higher activity of rectus femoris and gastrocnemius were found in the late stance and the swing phase respectively.
authors.affiliation: Department of Sports Science and Physical Education, Faculty of Education, The Chinese University of Hong Kong, Hong Kong, China.
authors.forename: Daniel Tik-Pui
authors.initials: DT
authors.lastname: Fong
authors.forename: Youlian
authors.initials: Y
authors.lastname: Hong
authors.forename: Jing-Xian
authors.initials: JX
authors.lastname: Li
mesh_terms: D000058:Accidental Falls / Q000517:prevention & control*; D001696:Biomechanical Phenomena; D004576:Electromyography; D006801:Humans; D007596:Joints / Q000502:physiology*; D035002:Lower Extremity / Q000502:physiology*; D008297:Male; D019415:Torque; D016138:Walking / Q000502:physiology; D055815:Young Adult