Metabolic Cost, Mechanical Work, and Efficiency during Normal Walking in Obese and Normal-Weight Children

Autor/inn/en	Huang, Liang; Chen, Peijie; Zhuang, Jie; Zhang, Yanxin; Walt, Sharon
Titel	Metabolic Cost, Mechanical Work, and Efficiency during Normal Walking in Obese and Normal-Weight Children
Quelle	In: Research Quarterly for Exercise and Sport, 84 (2013), (8 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0270-1367
DOI	10.1080/02701367.2013.849159
Schlagwörter	Children; Child Health; Obesity; Elementary School Students; Foreign Countries; Comparative Analysis; Physical Fitness; Body Weight; Metabolism; Physical Activities; Biomechanics; China + Suchen Sie Ihr Suchwort? Child; Kind; Kinder; Adipositas; Ausland; Leistungsfähigkeit; Körpergewicht; Stoffwechsel; Biomechanik
Abstract	Purpose: This study aimed to investigate the influence of childhood obesity on energetic cost during normal walking and to determine if obese children choose a walking strategy optimizing their gait pattern. Method: Sixteen obese children with no functional abnormalities were matched by age and gender with 16 normal-weight children. All participants were asked to walk along a nearly circular track 30 m in length at a self-selected speed. Spatiotemporal data, kinematics, and ground reaction force were collected during walking using a three-dimensional motion analysis system. Metabolic cost was collected by a portable gas analyzer simultaneously. Results: The mechanical energy expenditure (MEE) was 72.7% higher in obese children than in normal-weight children. The net metabolic cost was 65.7% higher in obese children. No difference was found in the metabolic rate (J·kg[superscript - 1]·m [superscript - 1]), normalized MEE (J·kg- 1·m[superscript - 1]) and mechanical efficiency between the obese and normal-weight groups. The obese children walked with a 0.15 m/s slower walking speed, 10.0% shorter cadence, and 30.9% longer double-support phase compared with normal-weight children. In addition, no differences were found in the mediolateral and vertical body center of mass displacement. Conclusion: Body mass played a dominant role in the total metabolic and mechanical cost per stride. Obese children may adopt a walking strategy to avoid an increase in the metabolic cost and the mechanical work required to move their excess body mass. (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10