Abstract
Background: The aim of this study was to evaluate the changes in postural control and stability among prep school students in Tanta city with and without backpacks. Method: The study was conducted with a sample of 30 children, 16 boys and 14 girls with a mean age (years) 13 + 1.03, body mass (kg) 40.6 + 10.14, height (m) 1, 50 + 0.15, BMI (kg / m²) 20.25 + 3.70. Samples were selected randomly, divided into 2 equal groups. Group (A):15 Participants tested with back packs, group (B): 15 Participants tested without back packs. Balance assessment was done in biomechanics lab, faculty of physical therapy, Delta University for Science & Technology. The dynamic balance parameters (Anterior posterior (AP), Mediolateral (ML) and Overall (OA) stability indices) measured by Biodex Balance System at stability level-7, with standard load (3 kg), based on average back pack mass of the volunteers. Results: the results suggest there was statistical significant difference between both groups (A&B) (P< 0.05). There is decrease in balance parameters including (OA, AP and MLindices) at seven level of stability during the dynamic balance test in group A which tested with back packs compared with group B which tested without backpacks. Conclusions: When comparing between the mean values of participant's stability indices (OA, AP and ML) at stability level-7 within the same group (A or B), there was no statistical significant difference (P> 0.05).
Highlights
The use of backpacks covers almost all of the children who attend the school
The load carried in his or her backpack during testing was calculated using the average of the values of the mass of the back pack of all children on the test day (3 kg) was established., Balance assessment was done in biomechanics lab, Faculty of physical therapy, Delta University for Science & Technology
As shown in table (1), the mean values of overall, antero posterior and medio lateral stability index at stability level seven for group A :( prep school students tested with backpacks) versus group B were as follows: Overall Stability Index Statistical analysis of the mean values of overall stability index for the group A and group B showed high significant differences
Summary
The use of backpacks covers almost all of the children who attend the school. The scope of the use of such material by school children is by its utility, since the bags are presented as a suitable device for transporting loads in the column next to and symmetric shape while maintaining stability. Http://www.ijetmr.com©International Journal of Engineering Technologies and Management Research [23]. Backpack is one of the most common and popular bags among different segments of society, especially students. Various studies have been reported that backpack has great popularity among various methods of carrying school books and stationaries (2). Carrying heavy bags may cause musculoskeletal disorders and balance problems among students (3)
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