Volume 35, Issue 2 (May 2024)
Studies in Medical Sciences 2024, 35(2): 107-115 |
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Oliaei F, Jafarnezhadgero A, Fatahi A, Khezri D. THE EFFECT OF BACKPACK WEIGHT ON SYMMETRY INDEX BETWEEN DOMINANT AND NON-DOMINANT LEGS AMONG FEMALE STUDENTS DURING WALKING. Studies in Medical Sciences 2024; 35 (2) :107-115
URL: http://umj.umsu.ac.ir/article-1-6023-en.html
URL: http://umj.umsu.ac.ir/article-1-6023-en.html
Associate Professor of Sports Biomechanics, Department of Sports Biomechanics, Mohaghegh Ardabili University, Ardabil, Iran (Corresponding Author) , amiralijafarnezhad@gmail.com
Abstract: (184 Views)
Background & Aims: The impact of the weight of backpacks with different weights on the foot, which is the link between the human body and the ground, has received less attention from researchers. Therefore, the aim of this study was to compare ground reaction force distribution between dominant and non-dominant legs among female students while carrying different loads.
Materials & Methods: The present study was semi-experimental and laboratory. Twenty female students at age of 14-17 participated as subject in this semi-experimental study. Participants carried backpacks with 10%, 15%, and 20% of body weight during walking. Ground reaction force data of subjects in both dominant and non-dominant legs was collected by a foot pressure system. Repeated measure ANOVA was run to analyze the obtained data. All the analyzes were performed at a significance level of 0.05 using SPSS 22 software.
Results: The results showed that the symmetry index between dominant and non-dominant legs in lateral heel (P=0.045), second and fifth metatarsals (P=0.023), toes 2-5 (P=0.000) were significantly greater in carrying backpack 20% of body weight as compared to 10% of body weight.
Conclusion: According to the results, it seems that increasing weight of backpack can rise the symmetry index between dominant and non-dominant legs that indicate difference and dissimilarity in performance of dominant and non-dominant legs in students.
Materials & Methods: The present study was semi-experimental and laboratory. Twenty female students at age of 14-17 participated as subject in this semi-experimental study. Participants carried backpacks with 10%, 15%, and 20% of body weight during walking. Ground reaction force data of subjects in both dominant and non-dominant legs was collected by a foot pressure system. Repeated measure ANOVA was run to analyze the obtained data. All the analyzes were performed at a significance level of 0.05 using SPSS 22 software.
Results: The results showed that the symmetry index between dominant and non-dominant legs in lateral heel (P=0.045), second and fifth metatarsals (P=0.023), toes 2-5 (P=0.000) were significantly greater in carrying backpack 20% of body weight as compared to 10% of body weight.
Conclusion: According to the results, it seems that increasing weight of backpack can rise the symmetry index between dominant and non-dominant legs that indicate difference and dissimilarity in performance of dominant and non-dominant legs in students.
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