Pain Outcomes with an Elliptical Regimen (POWER) Study: Identifying the Proper Dosage of Exercise for Therapeutic Effect in Persons with Chronic Back Pain

Background context Exercise therapy for low back pain has long been prescribed as one of the initial remedies for back pain. Traditional therapy is completed under a therapist's supervision and consists of lumbar stabilization, aerobic exercise and stretching exercises. Recent studies have explored treating back pain with aerobic exercise such as walking which can be done anywhere and without supervision which is lower cost and easily administered. Purpose To assess a therapeutic dosage of aerobic exercise that is associated with pain reduction in persons experiencing low back pain. Study design Case series. Participant description Sixteen patients entered the study and twelve patients completed the study (mean ± SD: age 51 ± 11 years; weight 89.2 ± 16 kg). Subjects were included if they were ages 18-65, had chronic back pain lasting for more than 3 months and a score of greater than 30% on the Oswestry Low Back Disability Questionnaire. Methods Subjects underwent a six-week exercise program using the elliptical trainer three times each week. Exercise duration was steadily increased each week for the length of the study. The total cumulative amount of work that coincided with significant reductions in chronic low back pain was then identified. Results At 4 weeks, pain scores were significantly reduced from baseline (3.2 vs 4.7, p