Prevalence of Scapular Muscles Weakness in Painters with Lateral Epicondylitis

Background: Lateral epicondylitis (LE), commonly known as tennis elbow, is frequently observed in occupational groups such as painters, where repetitive upper limb activity places stress on both distal and proximal musculature. Emerging evidence suggests that scapular muscle weakness may exacerbate symptoms and functional limitations in individuals with LE. Objective: To assess the prevalence of scapular muscle weakness in painters diagnosed with lateral epicondylitis and examine its correlation with pain intensity, grip strength, and functional disability. Methods: A cross-sectional observational study was conducted involving 100 painters aged 30–55 years with clinically diagnosed LE. Primary outcomes included pain intensity (VAS), grip strength (hand dynamometer), and functional status (PRTEE questionnaire). Secondary outcomes involved assessment of elbow and wrist ROM, muscle tenderness, and scapular muscle dysfunction. Results: Serratus anterior weakness was present in 41% of participants, lower trapezius in 38%, and rhomboid/middle trapezius in 28%. Scapular dysfunction demonstrated a strong positive correlation with PRTEE scores (r = 0.68), moderate positive correlation with pain (VAS) (r = 0.59), and a moderate negative correlation with grip strength (r = –0.61), all statistically significant (p < 0.001). Conclusion: Scapular muscle weakness is highly prevalent among painters with LE and significantly correlates with pain and disability. Integrated rehabilitation targeting scapular stabilization may enhance outcomes in occupational settings with high upper limb demand.