The Comparison of Posture, Muscle Exertion, Productivity and Self Usability between Smart Phone and Computer Use in Different User Configurations

2014-08-012024-05-14https://scholars.lib.ntu.edu.tw/handle/123456789/659091摘要：智慧型手機為已成為許多人生活、娛樂與工作之重要工具，過去針對電腦使用者的研究顯示，相關的健康議題以視覺症狀及肩頸上肢肌肉骨骼不適比例最高，而手機使用者也同樣暴露於長時間固定的不良姿勢下，如何量化其人因暴露、探討產品設計與個人使用習慣對之影響、給予健康促進或症狀預防之建議，仍待更多的實證醫學支持。許多因素會影響行動電子裝置使用者的姿勢，比如裝置的尺寸、字體尺寸、位置、觸控鍵盤設計等等，而使用手機的觸控或操作方式有較大變異性，如單手或雙手握持以及使用不同手指觸控，但過去的研究幾乎都以單手操控使用為主，究竟這些不同的操作方式對於肩頸上肢的角度與肌肉負荷有何影響，仍有待研究。本計畫將使用重複性測量的實驗室研究，分析使用不同握持姿勢操作智慧型手機，其上肢與頸部肌肉不適狀況、關節角度變化以及肌電圖訊號的變化，並分析與姿勢與其他影響因子之相關性。預計募集三十位受試者，使用五種不同的姿勢在手機上輸入文字，並比較使用桌上型電腦的鍵盤輸入。測量工具包括電子量角器、表面肌電圖以及問卷調查。並探討其影響因子，以期能了解智慧型手機使用者的人因暴露，並藉此給予使用者適當的建議。<br> Abstract: Smart phones had become important devices for everyday’s life, leisure and work. Previous studies in computer users showed high prevalence of visual and musculoskeletal disorders. Meanwhile, the users of smart phones are also at risk of static and awkward postures of upper limbs and neck. In order to promote user’s health or prevent symptoms under evidence-based practice, it is crucial to quantify the ergonomic exposure and explore the influence of device design and user’s habit. The posture during using mobile device is affected by many factors: size of device, size of characters, position of device, design of keyboard, etc. Moreover, the users may use different methods to holding device or key-in, i.e. single- vs. bilateral-hand or thumb vs. index. Most of the prior studies use one-hand holding only. The influence of different methods of holding device/key-in on the posture and muscle activities of neck/upper limbs remains to be studies. Current study will use repeated measurement in a laboratory setting. We will explore the influence of different holding device/key-in on posture and muscle activities. Thirty subjects will participate in the study. They will type by using smart phones with five postures and also a desktop computer. Electro-goniometers, surface electromyography and questionnaire will be used for exposure assessment and outcome evaluation. Our results will be able to provide comprehensive data for further recommendation for smart phone users.The Comparison of Posture, Muscle Exertion, Productivity and Self Usability between Smart Phone and Computer Use in Different User Configurations