Range of Motion Simulation of Hip Joint Movement during Salat Activity

• Published in: The Journal of arthroplasty Vol. 32; no. 9; pp. 2898 - 2904
• Main Authors: Jamari, J., PhD, Anwar, Iwan Budiwan, MD, Saputra, Eko, MSc, van der Heide, Emile, PhD
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 01-09-2017
• Subjects: Computer Simulation; hip joint; Hip Joint - pathology; Hip Joint - surgery; Humans; impingement; Islam; Models, Anatomic; Motion; Movement; Orthopedics; Posture; range of motion; Range of Motion, Articular; Religion; religious activity; Rotation; salat; salat; impingement; hip joint; range of motion; religious activity
• ISSN: 0883-5403; 1532-8406
• DOI: 10.1016/j.arth.2017.03.056

Abstract Background Impingement of an artificial hip joint due to limited range of motion (RoM) during human activity is one of the main sources of hip joint failure. The aim of this paper is to simulate the RoMs of hip joints during salat , the practice of formal worship in Islam. Methods Salat consists of several stages which can be represented with a cycle (raka’ah). Every raka’ah consists of standing, bowing (ruku’), straightening up (i’tidal), transition of standing towards prostrating, prostrating (sujud) and sitting. A virtual skeleton model was employed to analyze the motion during salat for the possibility of the impingement occurrence. Results The results of the simulation were presented in terms of maximum flexion, abduction and internal or external rotation. The results also showed that the prostration position is similar in RoM with the Japanese zarei position, and similar in RoM to picking up an object while sitting in a chair. Conclusion Specific aspects of salat such as the difference in position of the two legs at the last sitting position create an extreme range of motion which in turn results in a high risk of impingement.