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Medicine and Science in Sports and Exercise
1999 Volume 31, Number 1
David M. Carpenter and Brian W. Nelson

Study Outcomes & Clinical Relevance: Isolated lumbar extension exercise with the pelvis stabilized using specialized equipment elicits the most favorable improvements in low back strength muscle cross-sectional area, and vertebral bone mineral density. Improvements occur independent of diagnosis, are long-lasting, and appear to result in less re-reutilization of the health care system than other more passive treatments.