The Effect Of Two Different Backpack Ways On The Body Posture Of Primary School Students

Objective: schoolbag is an important part of the life of school aged children,and it is an important factor that affects the growth and development of children.In recent years,the state of sub-health of students is becoming more and more serious,and the number of patients is increasing year by year.There are many problems in children and adolescents,the main reason is that students learn too much burden.For a long time carrying a heavy bag,a neck and shoulder discomfort,including neck and shoulder muscle soreness,stiffness,etc..Therefore,the purpose of this paper is to study the backpack on the back of the chest and the traditional way back the way back,what kind of way to pack more scientific,to school-age children affect the growth of smaller,provide guidance for the design parameters of bag.In this paper,through the literature search,grasp the proportion of the number of children in rural and urban areas,backpacks,backpack time,distance and other aspects of the data,analysis of the subject of research.In the past,people started to study the research results and the present situation of the knapsack problem,mainly on the balance of body balance,body posture and gait analysis.The main research on the fixed load,the chest and the back backpack backpack two ways in one gait cycle changes,neck and chest inclination,and the change of thoraco lumbar anteversion;at the same time,using the Biodex balance,the balance test in the two students in the backpack under the way to calculate the size of the risk of falls.Methods: 1 below 14 years old with body shape and function of normal 9 pupils in the experimental subjects,height 140.11 weight 31.533 + 5.253 + 8.86,respectively;two way back and shoulders backpack,loaded 4.6kg(accounting for 15% of their body weight,BW),on the treadmill 1.1m/s speed walking 20 minutes by two,the digital camera(shooting frequency 50Hz)record of three dimensional kinematics parameter walking;gait cycle were continuous,stable and complete,then the biomeehanieal analysis software Signal TEC3 D to parse the test video;complete the 20 min test after two backpack walking,knapsack mode,Index balance system the test,including primary balance ability under the static load test,static balance ability of pupils under test chest backpack,backpack back under the static balance ability of students Test of the dynamic balance of the backpack under the test of the ability to test the dynamic balance of the backpack.The corresponding equilibrium data.The statistical analysis of the data using SPSS17.0 software.Conclusion: the chest backpack mode,a gait cycle to shorten the back backpack,backpack bag and chest size,occlusion at the foot of the road and the students at the foot of the space position and the chest with 15%BW vision abnormal load the torso forward angle and the.We found in the coronal and sagittal projection angle in the process of comparison,have no correlation with the back chest backpack backpack,two in the coronal plane did not change significantly,in the cause of scoliosis on performance of two kinds of way to pack is no obvious side,which can bear more loads and shoulders the uniform.We found in the static balance test,the students in the back and no packet process,there is no obvious difference between the balance index,but in the center of the quadrant section can be seen,no load in the center of the region to meet the more time advantage;compared to front and back and back,front and back a back focus move forward the trend,but were in the range of balance.The analysis of the dynamic balance of the back and found no dynamic load balance score showed some ups and downs,but do not go beyond the normal range of balance,compared with the previous two backpack,back show balance scores more balanced,this may be the strengths and normal physiological bending and life in this environment in the backpack.