The effects of load carriage on stature change

Pao Yue-kong Library Electronic Theses Database

The effects of load carriage on stature change

 

Author: Li, Man-fai Maxim
Title: The effects of load carriage on stature change
Degree: M.Sc.
Year: 2009
Subject: Hong Kong Polytechnic University -- Dissertations.
Spine -- Wounds and injuries.
Posture disorders.
Department: Dept. of Health Technology and Informatics
Pages: xii, 83 leaves : col. ill. ; 30 cm.
Language: English
InnoPac Record: http://library.polyu.edu.hk/record=b2303574
URI: http://theses.lib.polyu.edu.hk/handle/200/3641
Abstract: Background: The effects on postural changes, muscle response and gait kinematics have been reported. They were found to be affected by various carrying methods and load magnitudes. However, the direct effect of load carriage on spine is relatively limited unclear. This study aimed to compare the change in stature during anterior and posterior load carriage in healthy individuals. Methods: Ten volunteers were invited in this study. All subjects participated a training session and a reliability test prior to the load carriage experimental session. The training session allowed the subject to get familiar with standing onto the stadiometer. The reliability test was implemented to verify the participant's reliability to achieve the acceptable level of standard deviation of 0.5mm or less. For the subjects passed the reliability test, they were requested to carry a load equivalent to 15% of their body weight at anterior or posterior positions sequentially. The stature change was acquired in both carrying methods over time throughout the loading session. Findings: Nine subjects passed the reliability test and eight subjects had successfully completely the loading session. The main effect of load carriage and carrying duration on the change in stature were significant (p<0.05). The stature change in anterior load carriage was significantly more than posterior load carriage (p<0.05) while the change in stature mainly occurred at the beginning of loading period. The mean height loss for anterior load carriage was significantly greater than posterior carriage after prolonged load carriage with p<0.05. The stature reduction of subject was found to be time-dependent and changed over time. Conclusion: It was concluded an anteriorly carried load was not preferred to a posteriorly carried load as it would result in larger height loss with time.

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