The effects of age and type of carrying task on lower extremity kinematics

Date
2010-02-25
Authors
Gillette, Jason
Gillette, Jason
Stevermer, Catherine
Schwab, Charles
Miller, Ross
Meardon, Stacey
Schwab, Charles
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Kinesiology
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KinesiologyAgricultural and Biosystems Engineering
Abstract

The purpose of this study was to determine the effects of age, load amount and load symmetry on lower extremity kinematics during carrying tasks. Forty-two participants in four age groups (8–10 years, 12–14 years, 15–17 years and adults) carried loads of 0%, 10% and 20% body weight (BW) in large or small buckets unilaterally and bilaterally. Reflective markers were tracked to determine total joint range of motion and maximum joint angles during the stance phase of walking. Maximum hip extension, hip adduction and hip internal rotation angles were significantly greater for each of the child/adolescent age groups as compared with adults. In addition, maximum hip internal rotation angles significantly increased when carrying a 20% BW load. The observation that the 8–10-year-old age group carried the lightest absolute loads and still displayed the highest maximum hip internal rotation angles suggests a particular necessity in setting carrying guidelines for the youngest children.

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This is an Accepted Manuscript of an article published by Taylor & Francis in Ergonomics on 25 Feb 2010, available online: DOI: 10.1080/00140130903402234. Posted with permission.

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