Rabbi Mohammad Fazle, Ghazali Kamarul Hawari, Mohd Izzeldin I, Alqahtani Mahdi, Altwijri Omar, Ahamed Nizam Uddin
Faculty of Electrical and Electronics Engineering, Universiti Malaysia Pahang, Pahang, Malaysia.
College of Applied Medical Sciences, King Saud University, 11472 Riyadh, Saudi Arabia.
J Back Musculoskelet Rehabil. 2018;31(6):1097-1104. doi: 10.3233/BMR-170988.
This study aimed to investigate the electrical activity of two muscles located at the dorsal surface during Islamic prayer (Salat). Specifically, the electromyography (EMG) activity of the erector spinae and trapezius muscles during four positions observed while performing Salat, namely standing, bowing, sitting and prostration, were investigated. Seven adult subjects with an average age of 28.1 (± 3.8) years were included in the study. EMG data were obtained from their trapezius and erector spinae muscles while the subjects maintained the specific positions of Salat. The EMG signal was analysed using time and frequency domain features. The results indicate that the trapezius muscle remains relaxed during the standing and sitting positions while the erector spinae muscle remains contracted during these two positions. Additionally, during the bowing and prostration positions of Salat, these two muscles exhibit the opposite activities: the trapezius muscle remains contracted while the erector spinae muscle remains relaxed. Overall, both muscles maintain a balance in terms of contraction and relaxation during bowing and prostration position. The irregularity of the neuro-muscular signal might cause pain and prevent Muslims from performing their obligatory prayer. This study will aid the accurate understanding of how the back muscles respond in specific postures during Salat.
本研究旨在调查在伊斯兰祈祷（礼拜）期间位于背部表面的两块肌肉的电活动。具体而言，研究了在进行礼拜时观察到的四个姿势（即站立、鞠躬、坐着和叩头）期间竖脊肌和斜方肌的肌电图（EMG）活动。七名平均年龄为28.1（±3.8）岁的成年受试者纳入了该研究。当受试者保持礼拜的特定姿势时，从他们的斜方肌和竖脊肌获取EMG数据。使用时域和频域特征分析EMG信号。结果表明，在站立和坐着姿势期间斜方肌保持放松，而竖脊肌在这两个姿势期间保持收缩。此外，在礼拜的鞠躬和叩头姿势期间，这两块肌肉表现出相反的活动：斜方肌保持收缩而竖脊肌保持放松。总体而言，在鞠躬和叩头姿势期间，两块肌肉在收缩和放松方面保持平衡。神经肌肉信号的不规则可能会导致疼痛并妨碍穆斯林进行他们的义务祈祷。本研究将有助于准确了解在礼拜期间背部肌肉在特定姿势下的反应。
