School and Graduate Institute of Physical Therapy, College of Medicine, National Taiwan University, Taipei, 100, Taiwan.
Ergonomics. 2012;55(11):1404-11. doi: 10.1080/00140139.2012.709543. Epub 2012 Aug 17.
Clinically, over-activation of upper trapezius (UT) muscular activity is a common cause of symptoms in computer users. The purpose of this study was to investigate the correlation between trapezius muscular activity and typing speed with and without taping. Twelve participants performed a typing task for 15 min with and without taping on the UT muscle. Electromyography (EMG) of the muscular activity of UT and lower trapezius (LT) was recorded. With or without taping, there was a significantly positive correlation (r = 0.40, p = 0.04) between typing speed and UT/LT. Additionally, UT and UT/LT ratios were lower with taping than without taping (difference = 5.2% and 26.9%). The LT ratio was higher with taping than without taping (difference = 5.8%). Taping can alter the muscular activity of the trapezius during typing and may have the potential to be applied in computer users to prevent over-activation of UT muscular activity. Practitioner Summary: The effect of taping was tested on typing speed and trapezius muscular activity. With or without taping, typing speed was correlated with trapezius activity. The muscle activity of the trapezius, however, was lower with taping than without taping. Thus, taping has the potential to prevent over-activation of UT muscular activity during typing.
临床上，上斜方肌（UT）过度活跃是计算机使用者出现症状的常见原因。本研究旨在探讨斜方肌肌肉活动与打字速度的相关性，包括是否使用肌贴。12 名参与者在使用和不使用肌贴的情况下，分别进行了 15 分钟的打字任务。记录了 UT 和下斜方肌（LT）的肌肉活动的肌电图（EMG）。无论是否使用肌贴，打字速度与 UT/LT 之间均存在显著正相关（r=0.40，p=0.04）。此外，与不使用肌贴相比，使用肌贴时 UT 和 UT/LT 的比值更低（差异=5.2%和 26.9%），而 LT 的比值更高（差异=5.8%）。肌贴可以改变打字时斜方肌的肌肉活动，并且有可能应用于计算机使用者，以防止 UT 肌肉过度活跃。从业者总结：测试了肌贴对打字速度和斜方肌肌肉活动的影响。无论是否使用肌贴，打字速度都与斜方肌活动相关。然而，与不使用肌贴相比，使用肌贴时斜方肌的肌肉活动更低。因此，肌贴有可能防止打字时 UT 肌肉过度活跃。
