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The Positive Effect of Measured Strength Training in Adolescent Scoliosis


    This research study involved adolescent patients with scoliosis with varying curvatures of the spine. Researchers use the MedX Rotary Torso Machine for the purpose of observing torso rotation strength training and measurement in each patient as well as asymmetry associated with curvature. The study demonstrated progress and considerable improvements in strength were documented throughout the study.


    While the cause of adolescent idiopathic scoliosis remains unknown, numerous factors have been proposed. Among these, a notable factor is the observation of muscle asymmetry resulting from spinal curvature. A cohort of twelve adolescent scoliosis patients underwent testing utilizing the MedX Torso Rotation Machine, engaging in diverse isometric strength exercises. The machine permits a pelvic range of motion up to a maximum of ninety-six (96) degrees on either side, with a study-specific limitation to a restricted arc of seventy-two (72) degrees, equating to thirty-six (36) degrees on each side. Initially, participants engaged in biweekly sessions, transitioning to weekly sessions as they progressed. The study spanned four months, with evaluations conducted monthly.

    Noteworthy findings included the peak isometric strength observed at the exercise onset, progressively diminishing towards the full rotation of thirty-six degrees to the left. Through torso rotation exercises, complete correction of muscle asymmetries was achieved in each patient, accompanied by significant differences in lumbar myoelectric activity during isometric strength assessments. Notably, no patients utilized a brace throughout the study.

    The study demonstrated a 12% to 47% enhancement in post-study isometric strength, albeit not targeting a curative outcome but rather documenting the mitigation of muscle asymmetry impacting torso rotation and strength. While strength training doesn’t address all facets of asymmetric rotation deficits, it remains efficacious. Specifically, isometric strength via torso rotation exhibited improvement in this study.

    Myoelectric activity was meticulously monitored, given its hypothesized influence on adolescent scoliosis. Electromyographic results consistently exhibited asymmetry at the training initiation. Regarding the absence of brace usage, proving effectiveness can be challenging. Researchers acknowledge that exercise training cannot supplant nonoperative brace therapy. However, patient noncompliance, a significant hurdle in brace therapy, was not a factor in the MedX Torso Rotation Machine testing.