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Do patients with chronic low back pain have a lower level of aerobic fitness than healthy controls?: are pain, disability, fear of injury, working status, or level of leisure time activity associated with the difference in aerobic fitness level?
Smeets RJ, Wittink H, Hidding A, Knottnerus JA. Smeets RJ, et al. Spine (Phila Pa 1976). 2006 Jan 1;31(1):90-7; discussion 98. doi: 10.1097/01.brs.0000192641.22003.83. Spine (Phila Pa 1976). 2006. PMID: 16395183
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