عنوان مقاله [English]
Background and Aim: The purpose of this study was to determine the effects of carrying backpack with different loads on the kinematic parameters during walking in elementary school students. Materials and Methods: Fifteen elementary school students with average age of 9.6±0.61 years were selected through convenient sampling method. Each Subject walked on the treadmill at a speed of 1.1 meters per second for 20 minutes while carrying backpacks under different conditions including 0, 10, 15 and %20 of their body weight. The gait was captured using a digital camera. Kinematic analysis was performed with Dartfish software. Data were analyzed by ANOVA with repeated measures (P<0.05). Results: Results showed that there was a significant increase in the knee flection in conditions 15% (P=0.02) and 20% (P=0.03), significant increase in ankle dorsiflexion for conditions 15% (P=0.03) and 20 % (P=0.04), and significant increase in step length for condition 20% (P=0.02) with increasing backpack load. Ankle plantar flexion angle for conditions 10% (P=0.01), 15% (P=0.02) and 20% (P=0.03) and step frequency decreased significantly in condition 20% (P=0.03) with increasing backpack load. Conclusion: Based on the results of this study, it seems that carrying backpack with weighted 10 to 15 percent of body weight is appropriate for elementary school students.
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