书包是学龄儿童往返学校携带书本及相关学习用品最简单易行的方式。目前社会对于书包的使用已形成共识,即若使用不当会对学龄儿童身体健康造成一定的影响和损伤,如颈、肩、背疼痛或不适、脊柱姿势、步态、足结构改变等[1-5]。因此,卫生保健工作者、教育界人士、家长越来越关注书包对学生身体产生的影响。国内外有大量关于书包对身体健康产生影响的因素研究,这些因素主要包括书包自身特征(书包设计、压力负荷分配特征)[6]、使用方式[7-8]、携 School bags are the easiest way for school-age children to bring books and related school supplies to and from school. At present, there is a consensus in society about the use of school bags. If improper use is made, the physical health of school-age children will be affected and damaged to some extent, such as neck, shoulder and back pain or discomfort, spinal posture, gait and foot structure changes, 5]. Therefore, health care workers, educators, parents are increasingly concerned about the impact of school bags on the students. There are a lot of domestic and foreign researches on the factors that affect the health of schoolbags. These factors include the characteristics of the schoolbag (the design of the schoolbag, the characteristics of pressure load distribution) [6], the way of using [7-8]