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Body size and walking cadence affect lower extremity joint power in children's gait.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Shultz, Sarah P. Hills, Andrew P. Sitler, Michael R. Hillstrom, Howard J.
Description	Country affiliation: Australia Author Affiliation: Shultz SP ( Institute of Health and Biomedical Innovation, Queensland University of Technology, 60 Musk Avenue, Kelvin Grove, Brisbane 4059, Australia. spshultz127@yahoo.com)
Abstract	Obese children move less and with greater difficulty than normal-weight counterparts but expend comparable energy. Increased metabolic costs have been attributed to poor biomechanics but few studies have investigated the influence of obesity on mechanical demands of gait. This study sought to assess three-dimensional lower extremity joint powers in two walking cadences in 28 obese and normal-weight children. 3D-motion analysis was conducted for five trials of barefoot walking at self-selected and 30% greater than self-selected cadences. Mechanical power was calculated at the hip, knee, and ankle in sagittal, frontal and transverse planes. Significant group differences were seen for all power phases in the sagittal plane, hip and knee power at weight acceptance and hip power at propulsion in the frontal plane, and knee power during mid-stance in the transverse plane. After adjusting for body weight, group differences existed in hip and knee power phases at weight acceptance in sagittal and frontal planes, respectively. Differences in cadence existed for all hip joint powers in the sagittal plane and frontal plane hip power at propulsion. Frontal plane knee power at weight acceptance and sagittal plane knee power at propulsion were significantly different between cadences. Larger joint powers in obese children contribute to difficulty performing locomotor tasks, potentially decreasing motivation to exercise.
File Format	HTM / HTML
ISSN	09666362
Issue Number	2
Volume Number	32
e-ISSN	18792219
Journal	Gait & Posture
Language	English
Publisher	Elsevier
Publisher Date	2010-06-01
Publisher Place	Great Britain (UK)
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Body Mass Index Obesity Discipline Orthopedics Gait Humans Male Journal Article Hip Joint Physiopathology Ankle Joint Walking Biomechanical Phenomena Knee Joint Imaging, Three-dimensional Female Physiology Analysis Of Variance Child
Content Type	Text
Resource Type	Article
Subject	Orthopedics and Sports Medicine Rehabilitation Biophysics Sports Science

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The contribution of passive-elastic mechanisms to lower extremity joint kinetics during human walking.

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Effect of end-stage hip, knee, and ankle osteoarthritis on walking mechanics.

The role of lower extremity joint powers in successful stair ambulation.

Potential of lower-limb muscles to accelerate the body during cerebral palsy gait.

Effects of obesity on lower extremity muscle function during walking at two speeds.

The role of excess mass in the adaptation of children's gait.

Lower limb biomechanics during gait do not return to normal following total hip arthroplasty.

The influence of incline walking on joint mechanics.

Body size and walking cadence affect lower extremity joint power in children's gait.

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