Auburn University, Department of Industrial and Systems Engineering, 3323 Shelby Center for Engineering Technology, Auburn, AL, USA.
Auburn University, Department of Industrial and Systems Engineering, 3301-F Shelby Center for Engineering Technology, Auburn, AL, USA.
Appl Ergon. 2019 Jul;78:217-223. doi: 10.1016/j.apergo.2019.03.007. Epub 2019 Mar 27.
Manual material handling (MMH) is associated with the development of work-related musculoskeletal disorders (MSDs). One-handed carrying is a particularly challenging form of MMH. Age and obesity have been increasing among the general and working populations in the United States and worldwide. While older and obese workers are more susceptible to MSDs in comparison to younger, healthy workers, the effects of one-handed carrying on trunk muscle activity among these populations have not been comprehensively studied. In this paper, we evaluate the effects of age and obesity on trunk muscle activity of six trunk muscle pairs during one-handed carrying of different loads. The results suggest that older and obese individuals do not exhibit considerably larger muscle activity than young and non-obese individuals while carrying a load of approximately 10 kg in one hand for relatively short distances. Accordingly, 10 kg appears to be an acceptable load to be occasionally carried in one hand by older and/or obese individuals from a muscle activity perspective.
人工搬运（MMH）与工作相关的肌肉骨骼疾病（MSD）的发展有关。单手搬运是一种特别具有挑战性的 MMH 形式。在美国和全球范围内，一般人群和劳动人口中的年龄和肥胖率都在不断上升。与年轻、健康的工人相比，年龄较大和肥胖的工人更容易患 MSD，但对于这些人群，单手搬运对躯干肌肉活动的影响尚未得到全面研究。在本文中，我们评估了年龄和肥胖对单手搬运不同负荷时 6 对躯干肌肉的躯干肌肉活动的影响。结果表明，在相对较短的距离内单手搬运约 10 公斤的负荷时，年龄较大和肥胖的个体的肌肉活动并不明显大于年轻和非肥胖的个体。因此，从肌肉活动的角度来看，10 公斤似乎是一个可以偶尔由年龄较大和/或肥胖个体单手搬运的可接受的负荷。
