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Effects of Pelvic Stabilization on Lumbar Muscle Activity During Dynamic Exercise

      Journal of Strength and Conditioning Research
      2005 Volume 19 Number 4
      Jun G. San Juan, James A. Yaggie, Susan Levy,
      Vert Mooney, Brian Udermann, and John M. Mayer

Study Outcomes & Clinical Relevance:
Pelvic stabilization is necessary to achieve optimal recruitment of the lumbar extensor muscles during dynamic extension exercises on a lumbar extension machine. Therefore, if the goal is to strengthen the muscles of the low back it is necessary to stabilized the pelvis with a clinically proven restraint system (found on MedX).

Pelvic Stabilization During Resistance Training - Its Effects on the Development of Lumbar Extension Strength
            Archives of Physical Medicine and Rehabilitation
      1994 Volume 75
      James E. Graves PhD, Michael L. Pollock PhD, Scott Leggett MS, Dan Foster,
      Dina C. Webb PT, Jan Matkozich, David M. Carpenter MS, Joseph Cirulli

Study Outcomes & Clinical Relevance:
The No Stabilization and the Stabilization groups showed significant and similar increases in the weight load of training. However, the post-training isometric torque values describing isolated lumbar extension strength improved only for the Stabilization group. Therefore, pelvic stabilization is required to effectively train the lumbar extensor muscles. The increased load for the No Stabilization group is attributed to increase in the strength of the hamstring and buttock muscles.
Comparison of Two Restraint Systems for Pelvic Stabilization during Isometric Lumbar Extension Strength Testing

      Journal of Orthopedic & Sports Physical Therapy
      January 1992 Volume 15 Number 1
      James E. Graves PhD, Cecily F. Fix MS, Michael I. Pollock PhD,
      Scott H. Leggett MS, Dan N. Foster MS, David M. Carpenter MS

Study Outcomes & Clinical Relevance:
The researchers examined the difference in two different stabilization methods (knee and foot restraints). Due to the differences in results standardization of the restraint system used is important for comparative purposes.

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