International Journal of Health Sciences and Research Vol.13; Issue: 8; August 2023 Website: www.ijhsr.org Original Research Article ISSN: 2249-9571 International Journal of Health Sciences and Research (www.ijhsr.org) 199 Volume 13; Issue: 8; August 2023 Prevalence of Mechanical Back Pain, Lumbar Lordosis and Disability Among Prolonged Standing Vs Prolonged Sitting Workers - Observational Study G. Malarvizhi 1 , V. Sudhakaran 2 , E. Divya 2 , S. Madhumitha 2 , R. Priyanka 2 1 Lecturer, 2 Undergraduate student; Department of Physical Medical and Rehabilitation, Department of Orthopaedics, PSG Hospitals, PSG College of Physiotherapy, Coimbatore, India Corresponding Author: G. Malarvizhi DOI: https://doi.org/10.52403/ijhsr.20230827 ABSTRACT Background of the study: Low back pain is a common medical condition usually self-limiting lasting less than 3 months. It is an emerging problem in the adolescents with an incidence that is highest in the 3 rd decade of life worldwide.60%-80% of adults experience low back pain in some point of their lifetime. When low back pain is untreated it leads to chronic low back pain which is the leading cause of disability. Objective: To identify the prevalence of low back pain in working professionals who predominantly use sitting posture and standing postures. Materials & Method: 30 individuals with low back pain were randomly assigned into standing and sitting group. The outcomes were measures of Pain, Lumbar lordosis, Disability mesured using Numerical pain rating scale, Flexible ruler, Quebec back pain disability scale. Study design: Observational Study-Cross sectional study. Study setting: Physical Medical and Rehabilitation, Orthopaedics Department, PSG Hospitals, Coimbatore. Participant: Study sample will consist of patient from PSG Hospitals. Study duration: 10 months. Result: 30 low back pain, individuals with each 15 individuals in standing group and 15 individuals in sitting group were recruited for this study. The analysis done between both the groups for pain, disability and lumbar lordosis. Conclusion: This study was conducted to find out the prevalence of mechanical back pain, disability and lumbar lordosis in prolonged sitting and standing posture in working with the age group of 25- 50years. The overall interpretation of the study states that back pain is prevalent in working professional who have standing occupation. Keywords: Mechanical low back pain, Lumbar lordosis, Flexible ruler, Disability, INTRODUCTION Low back pain is characterised as "pain and discomfort, localised below the costal margin and the inferior gluteal folds, with or without leg pain" and can be divided into three types: acute, subacute, and chronic (1) . Low back pain is classified as acute when an incident lasts less than six weeks, subacute when it lasts between six and twelve weeks, and chronic when it lasts for 12 weeks or more (1) . In recent years, low back pain has been among the most often reported musculoskeletal disorders. It is possible to experience low back discomfort in the lumbar, lumbosacral, or sacroiliac regions.