Partial versus full range of back extension endurance testing using the Swiss ball in discogenic low back pain patients: A comparative study

Abstract

Abstract Background and aim: Decreased back extensor muscles endurance is the most common significant finding in patients with discogenic low back pain (DLBP). The aim of this study was to determine whether the holding time at partial range of motion (ROM) is different from full ROM during back extension endurance testing. Methods: Fifty consecutive chronic DLBP patients (35 males, 15 females) aged between 25 and 65 years were recruited using a purposive sample. First, pain, back disability and sagittal mobility were measured to establish eligibility. Second, back extension endurance holding time was tested by measuring back extension on the Swiss ball at partial and full ROM. Results: The mean holding time, in seconds, for first partial and first full back extension was 20.9 (SD = 12.7) and13.2 (SD = 9.8) (p < 0.001), respectively. The mean holding time for second partial and second full back extension was 22.1 (SD = 16.1) and 14.6 (SD = 10.2) (p < 0.001), respectively. The holding time was analysed using paired-sample t-test. The intraclass correlation coefficient (ICCs) for partial and full back extension endurance testing was 0.93 and 0.96, respectively. Conclusion: The patients had increased holding time when back extension endurance testing was performed at partial as opposed to full range of motion.