
Agricultural and Biosystems Engineering Publications
Document Type
Article
Publication Version
Published Version
Publication Date
5-2009
Journal or Book Title
Journal of Applied Biomechanics
Volume
25
Issue
2
First Page
149
Last Page
155
Abstract
Farm youth commonly perform animal care tasks such as feeding and watering. The purpose of this study was to determine the effects of age, bucket size, loading symmetry, and amount of load on upper body moments during carrying tasks. Fifty-four male and female participants in four age groups (8–10 years, 12–14 years, 15–17 years, and adults, 20–26 years) participated in the study. Conditions included combinations of large or small bucket sizes, unilateral or bilateral loading, and load levels of 10% or 20% of body weight (BW). During bucket carrying, elbow flexion, shoulder flexion, shoulder abduction, shoulder external rotation, L5/S1 extension, L5/S1 lateral bending, and L5/S1 axial rotation moments were estimated using video data. The 8–10 year-old group did not display higher proportional joint moments as compared with adults. Decreasing the load from 20% BW to 10% BW significantly decreased maximum normalized elbow flexion, shoulder flexion, shoulder abduction, shoulder external rotation, L5/S1 lateral bending, and L5/S1 axial rotation moments. Carrying the load bilaterally instead of unilaterally also significantly reduced these six maximum normalized joint moments. In addition, modifying the carrying task by using smaller one-gallon buckets produced significant reductions in maximum L5/S1 lateral bending moments.
Access
Open
Copyright Owner
Human Kinetics, Inc.
Copyright Date
2009
Language
en
File Format
application/pdf
Recommended Citation
Gillette, Jason C.; Stevermer, Catherine A.; Meardon, Stacey A.; Derrick, Timothy R.; and Schwab, Charles V., "Upper Extremity and Lower Back Moments During Carrying Tasks in Farm Children" (2009). Agricultural and Biosystems Engineering Publications. 120.
https://lib.dr.iastate.edu/abe_eng_pubs/120
Included in
Agriculture Commons, Biomechanics Commons, Bioresource and Agricultural Engineering Commons
Comments
This article is from Journal of Applied Biomechanics 25, no. 2 (May 2009): 149–155.