Stability and metabolic analysis of walking on cross-slopes with various vertically placed backpack loads and without loads

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Title Stability and metabolic analysis of walking on cross-slopes with various vertically placed backpack loads and without loads
Publication Type dissertation
School or College College of Engineering
Department Mechanical Engineering
Author Elliott, Robin James
Date 2016
Description Though many who walk along roadside cambers and hill edges may have an interest in making their travels sure and effective, those most concerned may be soldiers in the infantry. They need to be injury free and have as much energy as possible when they march into battle. Walking on uneven ground without being injured by falling down (particularly with a heavy backpack) is generally accomplished by maintaining stability. This present study was conducted to determine an individual’s most stable position (using a stability formula which compares dynamic center of mass with center of pressure) when wearing a backpack under differing load positions - low back, middle back or high back â€" and differing walking angles: level, as well as along a cross-sloped surface. Furthermore, this study investigated the stability of persons walking along a cross-slope without a load. Finally, this study attempted to determine which combination of backpack load location and slope tilt best conserved metabolic energy. To carry out this backpack stability research, a group of 15 participants were asked to walk along an indoor track under the varying conditions mentioned (i.e., low to high backpack load positions and level to 10 degree tilted cross-slopes). The trials of their walks were performed randomly. The participants were recorded in a motion capture system and force plates documented their stepping times and locations. Again, the same 15 participants walked along the track under the same conditions, but without the loads to determine the effect of different cross-slope angles on their stability. Lastly, the same participants walked the track under the various conditions wearing portable oxygen sensors to analyze their energy expenditure. The results of these limited tests indicate no significant stability differences between 0, 5 or 10 degree angles in cross-slope walking loaded or unloaded. Nor was any significant stability differences noted between the various load locations of the backpacks. Nor was there a significant energy difference between the conditions.
Type Text
Publisher University of Utah
Subject backpack; cross-slope; Stability; Mechanical engineering; Biomechanics
Dissertation Name Doctor of Philosophy
Language eng
Rights Management (c) Robin James Elliott
Format application/pdf
Format Medium application/pdf
ARK ark:/87278/s6cz7cb8
Setname ir_etd
ID 1345102
Reference URL https://collections.lib.utah.edu/ark:/87278/s6cz7cb8
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