Moore Michael J, White Gregory L, Moore Donna L
Moore Chiropractic Wellness Centre, 1484 Hartnell Ave., #B, Redding, CA 96002, USA.
J Sch Health. 2007 May;77(5):232-9. doi: 10.1111/j.1746-1561.2007.00198.x.
There is debate about a 10% versus 15% of body weight cutoff point for safe weight of school backpacks. Estimation of the cutoff may be affected by use of survey methods and failure to assess pain experienced while wearing a backpack. Previous research also suggests that younger students and females are more at risk for developing backpack pain.
Five hundred and thirty-one 5th- to 12th-grade Northern California students and their backpacks were weighed. Students were individually interviewed about how often they experienced pain while carrying a backpack, the site of their pain, and if the pain had interfered with school activities or led to medical care.
Data support the use of a 10% of body weight cutoff for safe use of backpacks for all grade levels. Younger students and females are more at risk due to relatively lower body weight while females also carry heavier backpacks than males. Greater relative backpack weight is associated with upper- and mid-back pain reports but not neck or lower back pain; it is also associated with lost school time, lost school sports time, and greater chiropractic utilization.
The 10% cutoff is recommended along with a variety of practical methods to help schools achieve that goal for middle and high school students.
对于学校背包安全重量的体重截止点是10%还是15%存在争议。截止点的估计可能会受到调查方法的使用以及未能评估佩戴背包时所经历疼痛的影响。先前的研究还表明，较年轻的学生和女性患背包疼痛的风险更高。
对531名北加利福尼亚州5至12年级的学生及其背包进行称重。就他们携带背包时疼痛的频率、疼痛部位以及疼痛是否干扰学校活动或导致就医等问题，对学生进行了单独访谈。
数据支持将体重的10%作为所有年级背包安全使用的截止点。较年轻的学生和女性由于体重相对较低而风险更高，同时女性携带的背包也比男性更重。相对较重的背包重量与中上背部疼痛报告相关，但与颈部或下背部疼痛无关；它还与缺课时间、错过学校体育活动时间以及更多地接受脊椎按摩治疗有关。
建议采用10%的截止点以及各种实用方法，以帮助学校实现针对初中和高中学生的这一目标。
