Department of Physiotherapy, School of Rehabilitation, Tehran University of Medical Sciences, Tehran, Iran.
Trials. 2023 May 24;24(1):351. doi: 10.1186/s13063-023-07359-0.
Slump sitting is a common posture in workplaces. There is limited evidence that poor posture impacts the mental state. This study aims to investigate whether slump posture results in more mental fatigue during computer typing, compared with normal posture and also to compare the effectiveness of stretching exercises with tDCS in fatigue monitoring.
The sample size for this study is set at 36 participants with slump posture and 36 participants with normal posture. In the first step, to find out the differences between normal and poor posture, they will be asked to perform the typewriting task for 60 min. During the first and last 3 min of typing, mental fatigue as the primary outcome using EEG signals and further measures including kinematic behavior of neck, visual analog fatigue scale, and musculoskeletal discomfort will be assessed. Post-experiment task performance will be calculated based on typing speed and typing errors. In the next step, to compare the effect of tDCS and stretching exercises on the outcome measures, the slump posture group will receive these interventions in two separate sessions before the typing task.
With the assumption of showing significant differences in terms of outcome measures between slump and normal posture groups and also by showing the possible changes of the measures, by using either tDCS as a central modality or stretching exercises as a peripheral modality; the findings may provide evidence to indicate that poor posture has adverse effect on mental state and to introduce the effective method to overcome mental fatigue and promote work productivity.
Registered on the Iranian Registry of Clinical Trials on 21 September 2022, IRCT Identifier: IRCT20161026030516N2.
slumped 坐姿是工作场所常见的姿势。有有限的证据表明不良姿势会影响精神状态。本研究旨在探讨 slumped 姿势是否会在电脑打字过程中导致更多的精神疲劳，与正常姿势相比，以及比较拉伸运动与 tDCS 在疲劳监测中的效果。
本研究的样本量设定为 36 名 slumped 姿势参与者和 36 名正常姿势参与者。在第一步中，为了找出正常姿势和不良姿势之间的差异，他们将被要求进行 60 分钟的打字任务。在打字的第一分钟和最后三分钟，使用 EEG 信号评估主要结果，即精神疲劳，以及进一步的措施，包括颈部运动学行为、视觉模拟疲劳量表和肌肉骨骼不适。实验后的任务表现将根据打字速度和打字错误来计算。在下一步中，为了比较 tDCS 和拉伸运动对结果测量的影响，在打字任务之前，slump 姿势组将在两个单独的会议中接受这些干预措施。
如果假设 slumped 姿势组和正常姿势组在结果测量上显示出显著差异，并且通过显示措施的可能变化，通过使用 tDCS 作为中央模式或拉伸运动作为外围模式；研究结果可能提供证据表明不良姿势对精神状态有不良影响，并介绍克服精神疲劳和提高工作效率的有效方法。
于 2022 年 9 月 21 日在伊朗临床试验注册中心注册，IRCT 标识符：IRCT20161026030516N2。
