Publication:

電動搖擺座椅之機能性評估

坐姿工作者因長時間的固定坐姿，因此，衍生許多的肌肉骨骼疾患，尤其下背部的疼痛，是最常出現的身體不適症狀之一，其發生的原因大多為不良坐姿與長時間固定姿勢等因素。另一方面，坐姿工作者的長時間坐姿工作，減少下肢大肌肉群的收縮機會，使身體能量消耗減少，長時間下來，也許會造成肥胖的問題。基於上述的理由，發展出自動傾斜椅面的椅子，期望打破固定的姿勢並增加肌肉活動來消耗能量，於是設計本相依樣本實驗，取14位患有非特殊性下背痛之辦公室女性工作者，年齡介於30到46歲，利用肌耐力測試、背部功能表現量表、身體不適量表與氣體分析儀來評估動態搖擺座椅介入前後，對於女性下背痛患者的影響。結果發現，不論是動態搖擺座椅或靜態搖擺座椅，皆造成身體整體部分的不適感、頸部與下背部疼痛指數增加；而比較動、靜態座椅前後測差異量，動態座椅下背部疼痛指數的增加量顯著小於靜態座椅。肌耐力測試方面，俯臥等長胸部抬起法在經兩小時的動態座椅後，有顯著的下降。至於身體能量消耗與背部功能表現方面，則無顯著的差異。結論：自動搖擺座椅可以提供患有非特殊性下背痛女患者減緩長時間坐姿工作所產生的下背部疼痛，並且不會影響身體功能性的表現。

The seated workers always keep a fixed posture during working. Therefore, they always suffer from many musculoskeletal disorders. Low back pain is the most common symptoms especially because of poor posture and factors such as prolonged fixed posture. On the other hand, office workers with prolonged sitting decreased the movement of lower limbs that resulted in lower energy consumption. This probably caused obesity. For these above reasons, the automatic tilting seat of the chair was developed. The automatic tilting seat was designed to interrupt the fixed posture and increase energy expenditure by passive movement of body. So we designed this paired experiment. Fourteen female office workers with non-specificity low back pain, aged 30 to 46 years old, were recruited to determinate trunk muscle endurance, back functional performance and energy expenditure after intervention of the tilting seat for women with low back pain. It was found that both dynamic and static tilting seat increased analog pain scores at subtitle of whole body, neck and low back. When compared to the static seat and dynamic seat, the dynamic seat showed significantly less increased analog pain scores of low back than static seats. There was a significant decreased about muscle endurance test of prone isometric chest raise method after two hours dynamic seat intervention. There was no significant difference in energy expenditure and back functional performance. Conclusion: The automatic tilting seat can prevent low back pain that increased after prolong sitting without affecting the back functional performance for the female clerks with non-specificity low back pain.