Department of Kinesiology, Faculty of Applied Health Sciences, University of Waterloo, Waterloo, Ontario, N2L-3G1, Canada.
Department of Kinesiology, Faculty of Applied Health Sciences, University of Waterloo, Waterloo, Ontario, N2L-3G1, Canada.
Appl Ergon. 2020 Nov;89:103198. doi: 10.1016/j.apergo.2020.103198. Epub 2020 Jul 10.
The purpose of this investigation was to determine the effect of prolonged seated work, lift task, age and sex on normalized lumbar angles, thoracic angles, perceived effort and duration of lifts. A total of 17 young and 17 mature participants were recruited with an average (standard deviation) age of 23.8 (5.0) years and 63.7 (3.9) years, respectively. Participants completed 3 different floor to knuckle lifts before and following 90 min of seated work. The lifts included; (i) 7 kg symmetrical, (ii) 4.5 kg symmetrical and (iii) 4.5 kg asymmetrical. Prolonged seated work and age interacted to affect normalized peak lumbar angles (p = 0.0469) where older adults adopted 56(15)% flexion after seated work compared to 67(16)% among younger adults. Older adults took significantly longer to complete the lifting tasks compared to younger adults while age did not affect perceived effort across lifting tasks. Older workers may require age specific interventions given age specific responses.
本研究旨在确定长时间坐姿工作、举重任务、年龄和性别对腰椎角、胸椎角、感知用力和举重持续时间的归一化影响。共招募了 17 名年轻参与者和 17 名成熟参与者，平均（标准差）年龄分别为 23.8（5.0）岁和 63.7（3.9）岁。参与者在 90 分钟坐姿工作前后完成了 3 种不同的从地面到指关节的举重。举重包括：（i）7 公斤对称，（ii）4.5 公斤对称和（iii）4.5 公斤不对称。长时间坐姿工作和年龄相互作用影响归一化峰值腰椎角（p=0.0469），其中老年人在坐姿工作后采用 56（15）%的屈曲度，而年轻人为 67（16）%。与年轻人相比，老年人完成举重任务的时间明显更长，而年龄对举重任务的感知用力没有影响。鉴于年龄特异性反应，老年工人可能需要特定于年龄的干预措施。
