The Effects of Schoolbag Style on Muscle Activation in Lower Extremities during Level Walking and Hill Walking in Primary School Students

摘要: It was necessary to have a schoolbag that correct in size and style for the wearer held load against trunk. Some studies investigated effects of different bag styles on spine, trunk muscles gait parameters children, but few lower limbs during hill walking were addressed. The purpose this study compare muscle activation between (unloading, backpack & drag bag) level walking. Seven volunteers (2 male 5 female; 10.3 ± 1.5 yrs; 133.3 7.7 cm; 32.1 6.8 kg) Chiayi area participated study. All them finished six situations slopes × 3 styles) through treadmill at 2 km/hr. weight set 10% body weight. electromyography signals subject’s left vastus lateralis, biceps femoris, tibials anterior lateral head gastrocnemius stance phase collected using surface system foot switch sensors placed toe heel divide swing cycle. A two-way ANOVA with repeated measures used analyze schoolbags two situations. There no statistical difference iEMG unloading, backpack, walking; however, there significant lateralis When primary school students walk flat surface, regardless style. Walking significantly loads extremity activity