Industrial Engineering Department, Faculty of Engineering, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia.
Int J Environ Res Public Health. 2019 Oct 24;16(21):4104. doi: 10.3390/ijerph16214104.
It is important for schoolchildren and their parents (or guardians) to know which backpacks exert the least strain on the cardiorespiratory system. In this study, we investigated the physiological responses of participants while they were walking on a treadmill and wearing one of three different backpacks (A, B, and C) under two different load-carrying conditions (equivalent to 10% and 15% of their body mass, respectively). The first condition was used as a control and involved walking without a backpack, while the second involved wearing a backpack and carrying a certain weight. Thirty-one male students from King Saud University walked on a treadmill at 0.861 m/s and at a 0% inclination angle, while having their heart rates (beats∙min), oxygen uptakes (VO2, mL∙min), respiratory rates (breaths, VO2min), perceived exertion rates (PER, Borg scale), and backpack preference rates (BPR) measured and recorded. The results of our within-subject experimental design revealed that the physiological results varied significantly depending on the type of backpack. Backpacks B and C were superior to Backpack A, resulting in lower physiological responses and higher subjective preferences. Students carrying more weight experienced higher physiological stress; moreover, the use of Backpack C led to the lowest physiological strains and higher subjective preferences.
对于学童及其家长（或监护人）而言，了解哪种背包对心肺系统的压力最小是很重要的。在这项研究中，我们在参与者在跑步机上行走时，在两种不同的负重条件（分别相当于其体重的 10%和 15%）下，研究了他们佩戴三种不同背包（A、B 和 C）时的生理反应。第一种情况用作对照，即不背包行走，而第二种情况则是背着背包并携带一定重量。31 名来自沙特国王大学的男性学生以 0.861 m/s 的速度和 0%的倾斜角度在跑步机上行走，同时测量并记录他们的心率（次/分钟）、摄氧量（VO2，mL/分钟）、呼吸频率（次/分钟）、主观用力感觉等级（PER，Borg 量表）和背包偏好率（BPR）。我们的单因素被试内实验设计结果表明，背包类型对生理结果有显著影响。背包 B 和 C 优于背包 A，导致较低的生理反应和更高的主观偏好。携带更重重量的学生经历更高的生理压力；此外，使用背包 C 导致最低的生理压力和更高的主观偏好。
