 This study will compare patients with low back pain LBP to age and gender matched controls to determine if there are differences between the two groups related to: range of movement, secondary outcomes level of disability, quality of life, evidence of depression, anxiety or stress, movement patterns and demographic characteristics. The first phase will include a baseline and 3 month follow-up assessment of the LBP patients and controls, including demographic characteristics, outcome measures, and a physical assessment. The second phase is an ongoing phase with continued interim assessments of LBP patients only, at 6 and 12 months. 