title: Chronic low back disability: effects of a progressive activity program.
mesh_terms: D001416:Back Pain / Q000175:diagnosis / Q000534:rehabilitation*; D004734:Energy Metabolism; D005260:Female; D005684:Gait; D006801:Humans; D008124:Locomotion; D008297:Male; D010101:Oxygen Consumption; D005082:Physical Exertion; D014938:Work Capacity Evaluation