Introduction: Back pain is one of the most common reasons for limiting daily activities and functional disability in people, which can lead to the imposition of excessive costs directly and indirectly on the individual and the society. Meanwhile, despite the high prevalence, the main cause of back pain has not been determined exactly, and the existence of various treatment methods is the reason for the absence of a specific cause for back pain. Therefore, the purpose of this study was to investigate the relationship between the endurance of the trunk lateral flexor muscles and the level of functional disability in women with non-specific chronic back pain.
Research method: This is a descriptive epidemiological study. The statistical sample of the research consisted of 30 women with an age range (35-50 years) suffering from non-specific chronic back pain, who were selected by simple random sampling. Then, according to the entry and exit criteria of the research and ensuring the observance of ethics in the research, the endurance of the lateral trunk muscles and the functional disability of the subjects were measured by using the McGill lateral trunk endurance test and Osostery questionnaire, respectively. For data analysis, Pearson's correlation coefficient with a significant level (α ≤ 0.05) was used using spss software version 22.
Findings: The results of the research showed that there is a significant relationship between the endurance of the trunk lateral flexor muscles and the level of functional disability in women with non-specific chronic back pain (p≤0.05).
Conclusion: According to the results of the research, it seems that there is a relationship between the endurance of the trunk lateral flexor muscles and the level of functional disability in women with non-specific chronic back pain. Therefore, it is recommended to rehabilitation centers to pay attention to disorders related to the level of disability and pain of back pain patients in two stages of evaluation and rehabilitation.