Work-related musculoskeletal disorders are highly prevalent in the supermarket sector with manual material handling being one of the most commonly identified occupational risk factors. This cross-sectional study applied inertial motion capture and electromyography (EMG) to measure full-body kinematics and muscle activity of trapezius descendens and erector spinae longissimus during 50 manual material handling tasks performed by 17 workers in two supermarkets. The handling of bread and cucumbers to high shelf heights showed the highest trapezius muscle activity (from 47% to 59% peak normalized EMG), while the handling of bananas as well as lifting milk, bread and cucumbers from low to high positions showed the highest erector spinae activity (from 59% to 71%). Twenty-two tasks involved flexing the shoulders and trunk more than 90° and 50°, respectively. Based on these results, several manual handling practices in supermarkets should be reconsidered to reduce the physical work demands.

与工作相关的肌肉骨骼疾病在超市部门非常普遍，手工材料处理是最常见的职业风险因素之一。这项横断面研究应用惯性运动捕捉和肌电图 (EMG) 来测量在两个超市的 17 名工人执行 50 次手动材料搬运任务期间斜方肌和竖脊肌的全身运动学和肌肉活动。将面包和黄瓜处理到高架子高度显示出最高的斜方肌活动（从 47% 到 59% 峰值归一化 EMG），而处理香蕉以及从低到高位置举起牛奶、面包和黄瓜显示最高竖脊肌活动（从 59% 到 71%）。二十二项任务涉及将肩膀和躯干弯曲超过 90° 和 50°，分别。基于这些结果，应重新考虑超市中的几种人工搬运做法，以减少体力劳动需求。