We aimed to investigate the effects of instrument assisted manipulation (IAM) and Mulligan mobilization with movement (MWM) on joint range of motion (ROM), pain, proprioception, endurance, back awareness and disability in individuals with chronic non-specific low back pain (CNSLBP). Fifthy one participants were randomly divided into 3 groups. The first was the Mulligan group, the second was the IAM group, and the third was the core exercise group. Visual Analogue Scale (VAS) was used to assess pain severity. Lumbal flexibility was evaluated with the fingertip-to-floor test. Oswestry disability index (ODI) and Roland Morris Disability Questionnaire (RMDQ) used to evaluate the disability. Fremantle back awareness questionnaire (FBAQ) used to evaluate back awareness. Joint ROM (lumbal flexion, lumbal extension and lumbal lateral flexion) and proprioception (30° lumbal flexion in standing, 30° lumbal flexion in sitting, 15° lumbal extension standing and lumbal neutral position) evaluated with JTECH digital dual inclinometer. McGill core endurance tests were used for core endurance assessment. McGill core endurance assessment consists of 3 tests. These: Flexor endurance test, lateral endurance test and extensor endurance test.

IAM and Mulligan MWM interventions were applied 3 days a week for 2 weeks in total 6 sessions. All 3 groups did same core exercise program. The exercise program was done from the baseline for 6 weeks, 3 days a week, for a total of 18 sessions. Outcome measurements were done at baseline, at the end of the 2nd week, and at the end of the 6th week. The researcher who performed the outcome measurements did not know the participant's group. Assessment and treatment were performed by two different researchers with 8 years of professional experience. Visual Analogue Scale (VAS) was used to assess pain severity. Lumbal flexibility was evaluated with the fingertip-to-floor test. Oswestry disability index (ODI) and Roland Morris Disability Questionnaire (RMDQ) used to evaluate the disability. Fremantle back awareness questionnaire (FBAQ) used to evaluate back awareness. Joint ROM (lumbal flexion, lumbal extension and lumbal lateral flexion) and proprioception (30° lumbal flexion in standing, 30° lumbal flexion in sitting, 15° lumbal extension standing and lumbal neutral position) evaluated with JTECH digital dual inclinometer. The measurement of the joint ROM in the lumbal region with the dual inclinometer technique is a reliable method. McGill core endurance tests were used for core endurance assessment. McGill core endurance assessment consists of 3 tests. These: Flexor endurance test, lateral endurance test and extensor endurance test.

Inclusion Criteria:

• LBP for at least 3 months
• Diagnosis of non-specific LBP
• 20-55 ages.

Exclusion Criteria:

• Red flag symptoms related to LBP
• Neurological findings
• Pain radiating to the leg
• Undergone spinal surgery
• Pathology of the spine (fracture, tumor, spondylolisthesis, spinal stenosis, cauda equina syndrome).