The purpose of this study was to determine whether there were any postural, performance and perceived comfort differences between a conventional, straight keyboard and a new ergonomic keyboard design developed by Logitech called the Wave. Twenty experienced touch typists from various occupations randomly used each keyboard for a period of 30 minutes. Wrist and forearm postures ; typing speed and accuracy ; comfort and keyboard preferences were evaluated before and after using each keyboard. Compared to the conventional, straight keyboard, the Wave Keyboard reduced wrist extension by 4.6 ± 1.5° (p < 0.01), ulnar deviation by 1.8 ± 0.7° (p = 0.02) and forearm pronation by 1.3 ± 0.7° (p = 0.08). There were small differences in typing speed (47.2 vs 45.6 WPM; p = 0.02) and no differences in accuracy (94.1% vs. 94.0%, p = 0.78) between the Wave and conventional, straight keyboard, respectively. Subjective comfort ratings were higher in the hand (p = 0. 02) and forearm (p = 0.03), and 85% of the subjects preferred the Wave Keyboard after 30 minutes of use. The results indicate that the Wave Keyboard achieved its design goal of reducing wrist extension, ulnar deviation and forearm pronation while improving comfort and not compromising typing speed and accuracy.
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机译：本研究的目的是确定常规，直键盘和罗技开发的徽标称为波浪的新符号键盘设计之间是否存在任何姿势，性能和感知舒适性差异。来自各种职业的二十个经验丰富的触摸打字员随机使用每个键盘30分钟。手腕和前臂姿势;打字速度和准确性;在使用每个键盘之前和之后评估舒适和键盘偏好。与以往相比，直键盘，波浪键盘4.6±1.5°（P <0.01），尺偏差1.3±0.7减小腕延伸通过1.8±0.7°（p值= 0.02）和前臂内旋度（p值= 0.08） 。输入速度差异很小（47.2 Vs 45.6 WPM; P = 0.02），并且在波和常规，直键盘之间分别没有准确度（94.1％与94.0％，p = 0.78）。手中的主观舒适度较高（P = 0. 02）和前臂（P = 0.03），85％的受试者优选在使用30分钟后的波键盘。结果表明，波键盘实现了减少手腕延伸，尺尺偏差和前臂校展的设计目标，同时提高舒适性，不损害打字速度和准确性。
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