Increasing lumbar extensor strength correlates with decreasing subjective complaints of low back and leg pain. For Healthcare Professionals Lumbar strengthening on MedX requires a frequency of once a week to be effective. More frequent sessions are not shown to produce greater improvements. The MedX lumbar extensor machine is highly reliable and specific for the quantification of isometric lumbar strength through a 72 degree arc of lumbar extension.
Pelvic stabilisation is required to train effectively the lumbar extensor muscles.
When the pelvis is allowed to rotate during trunk extension exercises, the gluteal and hamstring muscles are exercised. Psychologically, patients completing the MedX programme have been shown to have a higher internal locus of control than patients who are not treated with exercise and this positively correlated with improvements in lumbar extensor strength. The Back Clinic Library of Clinical Research Articles Donelson et al. Mooney et al. Starkey et al.