Department of Orthopaedics, University Hospital of Ioannina, Neohoropoulo, Ioannina, Greece.
Eur Spine J. 2012 Oct;21(10):1936-41. doi: 10.1007/s00586-012-2328-6. Epub 2012 Apr 28.
Concerns have been raised regarding the effects of schoolbag carriage on adolescent schoolchildren and particularly those with a pre-existing spinal deformity. The purpose of this study was to determine the effect of school backpack loads in scoliotic and healthy school-age children during walking, in terms of peak vertical ground reaction forces and loading rates. We hypothesized that walking with a loaded backpack would have a greater effect on gait kinetics of scoliotic compared to healthy.
Eight children with idiopathic scoliosis and eight healthy children were assessed. Kinetic data were collected using two AMTI OR6-7 force-plates, while the subjects walked freely along a 6-m walkway under three walking conditions: (1) without a schoolbag, (2) carrying a schoolbag bilaterally (over both shoulders-symmetrical load) and (3) carrying a schoolbag unilaterally (over each shoulder-asymmetrical load). Kinetic data were collected and four parameters were calculated; peak ground reaction force at the first maximum force peak (F1), time needed to reach F1 (T1), loading rate of F1 (LRF1) and total contact time (T2).
We found no significant differences between the scoliotic and healthy children for any of the kinetic variables examined. In addition, the position of the bag did not seem to have any effect on loading rate.
The results of this study indicate that in terms of kinetic parameters during normal gait, the schoolbag load (symmetrical or asymmetrical) does not have a different effect on children with mild adolescent idiopathic scoliosis compared to normal controls.
人们对书包携带对青少年学生的影响，尤其是对那些存在脊柱畸形的青少年学生的影响表示担忧。本研究的目的是确定在行走过程中，脊柱侧凸和健康学龄儿童背负书包的负荷对峰值垂直地面反力和加载率的影响。我们假设，与健康儿童相比，脊柱侧凸儿童背负背包行走会对步态动力学产生更大的影响。
评估了 8 名特发性脊柱侧凸儿童和 8 名健康儿童。使用两个 AMTI OR6-7 测力板收集动力学数据，当受试者在三种行走条件下自由行走时：（1）不背书包，（2）双肩背书包（对称负荷），（3）单侧背书包（单侧负荷）。收集动力学数据并计算了四个参数：第一个最大力峰值（F1）时的峰值地面反力，达到 F1 所需的时间（T1），F1 的加载率（LRF1）和总接触时间（T2）。
我们没有发现脊柱侧凸儿童和健康儿童在任何动力学变量上有显著差异。此外，书包的位置似乎对加载率没有影响。
本研究结果表明，在正常步态的动力学参数方面，与正常对照组相比，书包负荷（对称或不对称）对轻度青少年特发性脊柱侧凸儿童没有不同的影响。
