Effects of Manual Load Carriage on Kinematics of Gait

Date
2015-04-14
Authors
Carlson, Mitchell
Cutler, Carlee
Stonwall, Morgan
Tilley, Emma
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Altmetrics
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Kinesiology
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Kinesiology
Abstract

Carrying hefty backpacks for extended periods of time is a daily part of life for college students across the nation. Studies on manual load carriage are limited, even though it affects a significant population of young adults. Previous research produced conflicting views on gait change with added weight in a backpack. According to a study that tested military personnel, length of stride increased as weight increased (Majumdar, Pal, and Majumdar, 2010). In a conflicting study, stride length and step time decreased as the weight increased (Kinoshita, 1985). We hypothesize that step length will increase as carried weight increases, as concluded in the military study, with the largest alteration in gait being observed at 20% of the participant’s body weight. According to a study on 19 year-old males, adverse effects began to emerge at 20% of the participant’s body weight (Al-Khabbaz, Shimada, Hasegawa 2008). Our subjects will walk the length of the GaitRite while carrying 0%, 10%, 20%, and 30% of their bodyweight. We will measure stride length, percent of time on one leg, width of stance, and step time. Posture will be visually examined as the participant walks with the specified weight. This qualitative measurement will only show if the subject is leaning forward or backward. We expect that individuals will take longer and quicker steps, will spend less percent time in single stance, and will lean forward with increased weight.

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