Unité de Recherche sur les Pathologies de l'Appareil Locomoteur 04 UR 07/08, CHU Habib Bourguiba, Université du Sud, 3029 Sfax, Tunisia.
Spine J. 2013 Dec;13(12):1835-42. doi: 10.1016/j.spinee.2013.06.023. Epub 2013 Oct 2.
Concerns have been raised about the effect of backpack carrying on adolescent balance. For adolescent idiopathic scoliosis (AIS) subjects, the effect of backpack carrying method on their balance has not been determined. Our aim is to examine the effects of backpack load and carrying method on AIS subjects' balance.
STUDY DESIGN/SETTING: Paired sample matched for age and sex.
Twelve healthy adolescents matched for age and sex with 14 adolescents with mild AIS participated in this study.
A test battery including clinical examination, radiological assessment, and stabilometric measurements of the postural sways in the upright standing posture were conducted.
Center of pressure excursions of our subjects were recorded with a stabilometric platform during the upright standing posture without a backpack and while carrying a backpack symmetrically and asymmetrically on each shoulder. For each carrying method, the backpack is loaded at 10% and 15% of body weight (BW).
Our results indicated that postural sways increased with increasing backpack load. These postural sways were observed when normal adolescents carried a backpack loaded with 15% BW load, whereas, for age- and sex-matched AIS subjects, these postural responses were observed for the 10% BW load. The symmetrical backpack carrying induced better balance compared with the asymmetrical one. Asymmetrical carrying on the convex side of the scoliotic curve affects AIS subjects' balance more than carrying it on the concave side.
Load carriage of 10% BW seems to alter AIS subjects' balance. Asymmetrical carrying should be avoided especially on the convex side of the scoliotic curve because it causes balance impairments that may increase spinal pain.
人们对背包对青少年平衡的影响表示担忧。对于青少年特发性脊柱侧凸（AIS）患者，背包携带方式对其平衡的影响尚未确定。我们的目的是研究背包负荷和携带方式对 AIS 患者平衡的影响。
研究设计/设置：配对样本，按年龄和性别匹配。
14 名轻度 AIS 青少年与 12 名年龄和性别相匹配的健康青少年参加了这项研究。
使用直立站立姿势的平衡测量仪进行了测试，包括临床检查、影像学评估和姿势摆动的测量。
在没有背包和双肩对称、不对称背包的情况下，记录了受试者在直立站立姿势下的中心压力偏移。对于每种携带方式，背包以 10%和 15%的体重（BW）加载。
我们的结果表明，随着背包负荷的增加，姿势摆动增加。当正常青少年携带 15% BW 负荷的背包时，会出现这些姿势摆动，而对于年龄和性别匹配的 AIS 患者，当携带 10% BW 负荷的背包时，会出现这些姿势反应。对称背包携带比不对称背包携带能更好地保持平衡。在脊柱侧凸曲线凸侧的不对称携带比在凹侧的携带更能影响 AIS 患者的平衡。
10% BW 的负荷似乎会改变 AIS 患者的平衡。应避免不对称携带，尤其是在脊柱侧凸曲线的凸侧，因为它会导致平衡障碍，可能会增加脊柱疼痛。
