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Volume 13, Issue 1 (Iranian Journal of Ergonomics 2025)
Iran J Ergon 2025, 13(1): 1-9 |
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Rezaie Pourmashizi F, Hajilou B, Heidarimoghadam R, Anbarian S, Anbarian M. Comparison of the Pattern of Muscle Synergy during Load Lifting with Two Techniques among Women with Non-specific Back Pain in the Healthy Group. Iran J Ergon 2025; 13 (1) :1-9
URL: http://journal.iehfs.ir/article-1-1047-en.html
URL: http://journal.iehfs.ir/article-1-1047-en.html
Fateme Rezaie Pourmashizi1 
, Behrouz Hajilou2 , Rashid Heidarimoghadam3 , Sara Anbarian4 , Mehrdad Anbarian *5
, Behrouz Hajilou2 , Rashid Heidarimoghadam3 , Sara Anbarian4 , Mehrdad Anbarian *5
1- Department of Sport Biomechanics, Faculty of Sports Sciences, Bu-Ali Sina University, Hamedan, Iran
2- Research Institute of Exceptional Children, Research Institute for Education, The Organization for Educational Research and Planning, Tehran, Iran
3- Department of Ergonomics, School of Public Health, Research Center for Health Sciences, Hamadan University of Medical Sciences, Hamadan, Iran
4- Department of Sports Injuries and Corrective Exercises, Faculty of Sports Sciences, Bu-Ali Sina University, Hamedan, Iran
5- Department of Sport Biomechanics, Faculty of Sports Sciences, Bu-Ali Sina University, Hamedan, Iran ,anbarian@basu.ac.ir
2- Research Institute of Exceptional Children, Research Institute for Education, The Organization for Educational Research and Planning, Tehran, Iran
3- Department of Ergonomics, School of Public Health, Research Center for Health Sciences, Hamadan University of Medical Sciences, Hamadan, Iran
4- Department of Sports Injuries and Corrective Exercises, Faculty of Sports Sciences, Bu-Ali Sina University, Hamedan, Iran
5- Department of Sport Biomechanics, Faculty of Sports Sciences, Bu-Ali Sina University, Hamedan, Iran ,
Abstract: (1578 Views)
Objectives: The core muscles of individuals with low back pain show a different activity pattern than the healthy group during load lifting. This issue may be due to changes in spinal control mechanisms, such as muscle synergies. The present study aimed to compare the synergy pattern of selected core muscles and lower limb muscles during load lifting and lowering with two different techniques among females with non-specific back pain in comparison with the healthy group.
Methods: A total of 18 healthy females with non-specific back pain and 18 match controls participated in this study. The activity of 8 muscles of the core and lower limbs was recorded while lifting a load of 10% of the subject's mass with stoop and squat techniques. Then, the pattern of muscle synergies was extracted using the non-negative matrix factorization algorithm. Pearson's correlation method and independent t-test were used to compare synergy patterns (P<0.05).
Results: Patients with back pain had a different muscle synergy pattern than those in the healthy group in stoop and squat techniques. The peak muscle synergy patterns of patients in both techniques were different from those of healthy subjects and were created in a different time cycle of lifting the load.
Conclusion: This study indicated that individuals with non-specific back pain use different synergy patterns during load lifting, and the body's control system may respond differently in patients with non-specific low back pain compared to healthy individuals. The changes observed in the relative weight of muscles in patients and healthy people may be caused by the changes in muscle synergy patterns, which require further studies.
Methods: A total of 18 healthy females with non-specific back pain and 18 match controls participated in this study. The activity of 8 muscles of the core and lower limbs was recorded while lifting a load of 10% of the subject's mass with stoop and squat techniques. Then, the pattern of muscle synergies was extracted using the non-negative matrix factorization algorithm. Pearson's correlation method and independent t-test were used to compare synergy patterns (P<0.05).
Results: Patients with back pain had a different muscle synergy pattern than those in the healthy group in stoop and squat techniques. The peak muscle synergy patterns of patients in both techniques were different from those of healthy subjects and were created in a different time cycle of lifting the load.
Conclusion: This study indicated that individuals with non-specific back pain use different synergy patterns during load lifting, and the body's control system may respond differently in patients with non-specific low back pain compared to healthy individuals. The changes observed in the relative weight of muscles in patients and healthy people may be caused by the changes in muscle synergy patterns, which require further studies.
Type of Study: Research |
Subject:
Biomechanics
Received: 2024/10/19 | Accepted: 2025/05/31 | ePublished: 2025/05/31
Received: 2024/10/19 | Accepted: 2025/05/31 | ePublished: 2025/05/31
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