Discrepancies exist in backpack load recommendations for obese/overweight children, and the recommendations do not consider school trolleys. This study analysed obese/overweight and healthy-weight students’ perceived load and fatigue when carrying schoolbags and their gait kinematics and rate of perceived exertion (RPE) when carrying backpacks or pulling school trolleys with different loads. Twelve obese/overweight and 36 healthy-weight students were asked about their perceived load and fatigue in carrying their schoolbags to school. Then, a kinematic gait analysis was completed in students walking unloaded or transporting 10%, 15% or 20% of their bodyweight (BW) in a backpack or trolley. RPE was recorded after each condition.

The average hip rotation and knee adduction angles differed between body mass index (BMI) groups. The healthy-weight group reported higher RPEs than the overweight/obese group when pulling a trolley with 10–15% BW.

In conclusion, both BMI groups responded similarly to load and schoolbag type.

针对肥胖/超重儿童的背包负载建议存在差异，并且建议不考虑学校手推车。本研究分析了肥胖/超重和健康体重学生在背书包时的感知负荷和疲劳，以及他们在背负背包或拉动不同负荷的学校手推车时的步态运动学和感知用力率 (RPE)。12 名肥胖/超重学生和 36 名健康体重学生被问及他们在背书包上学时感知到的负荷和疲劳程度。然后，对在背包或手推车中负重行走或携带 10%、15% 或 20% 体重 (BW) 的学生进行运动学步态分析。在每个条件之后记录 RPE。

体重指数 (BMI) 组之间的平均髋关节旋转角度和膝关节内收角度不同。当拉动 10-15% BW 的手推车时，健康体重组报告的 RPE 高于超重/肥胖组。

总之，两个 BMI 组对负载和书包类型的反应相似。