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Changes in lower extremity peak angles, moments and muscle activations during stair climbing at different speeds.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Lewis, Jacqueline Freisinger, Greg Pan, Xueliang Siston, Robert Schmitt, Laura Chaudhari, Ajit
Description	Author Affiliation: Lewis J ( Department of Biomedical Engineering, The Ohio State University, Columbus, OH 43210, United States); Freisinger G ( Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, OH 43210, United States); Pan X ( Center for Biostatistics, The Ohio State University, Columbus, OH 43210, United States.); Siston R ( Department of Biomedical Engineering, The Ohio State University, Columbus, OH 43210, United States); Schmitt L ( School of Health & Rehabilitation Science, The Ohio State University, Columbus, OH 43210, United States.); Chaudhari A ( Department of Biomedical Engineering, The Ohio State University, Columbus, OH 43210, United States)
Abstract	Stair climbing is a common daily activity, yet there is no basic knowledge on how lower extremity joint angles, moments or muscle activations are affected by stair climbing speed. This information will determine whether speed matching is necessary for stair climbing studies. Moreover, changes in lower extremity biomechanics during stair climbing at different speeds will aid in the clinical interpretation of a patient's maximal stair climbing speed. Thirty healthy participants provided consent. Kinematics, kinetics, and muscle activations were collected on a three step staircase. Subjects climbed the staircase at normal, slow and fast self-selected speeds. Linear mixed models for repeated measures were used to study the associations between speed and the lower extremity peak joint angles and moments, and muscle activations. The peak hip flexion and extension moments increased with increasing speed, while peak knee flexion moment did not vary consistently with speed. The peak muscle activations varied consistently with respect to the sagittal plane kinetics. These results suggest that in healthy subjects, the hip is the greatest contributor when modulating stair climbing speed, while additional knee contributions do not appear necessary to increase speed. Further stair studies should consider speed matching in order to accurately assess biomechanical differences.
File Format	HTM / HTML
ISSN	10506411
Issue Number	6
Volume Number	25
e-ISSN	18735711
Journal	Journal of Electromyography and Kinesiology
Language	English
Publisher	Elsevier
Publisher Date	2015-12-01
Publisher Place	Great Britain (UK)
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Cardiology Lower Extremity Physiology Muscle, Skeletal Range Of Motion, Articular Adolescent Adult Biomechanical Phenomena Female Gait Humans Knee Joint Male Walking Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Neuroscience Neurology (clinical) Biophysics Sports Science

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