Changes in posture through the use of simple inclines with notebook computers placed on a standard desk
This study evaluated the effects of inclining a notebook computer on upper extremity postures. Fifteen adults performed a standardized computing task on a notebook placed flat on a desk (DESK), inclined at 12° (INC12) and inclined at 25° (INC25) while a motion analysis system measured upper extremity postures. Compared to the DESK, the inclines reduced forward head tilt approximately 3° per incline level while neck flexion was reduced 2° per level. Wrist extension was increased on average 5° and 12° for the INC12 and INC25 configurations, respectively. In conclusion, the inclines led to a tradeoff between adverse wrist extension and improved head and neck posture. We recommend the 12° incline if tasks do not involve a high degree of internal keyboard and mouse use (i.e. reading) while the 25° incline is not recommended if the internal input devices are used.
Krishna Asundi Dan O’Dell Jack T. Dennerlein
Harvard School of Public Health Microsoft Hardware Corporation
国际会议
17th World Congress on Ergonomics(第十七届国际人类工效学大会)
北京
英文
1-5
2009-08-09（万方平台首次上网日期，不代表论文的发表时间）