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RECRUITING Not applicable ClinicalTrials.gov

Immediate Effect of Lumbar Mobilization on Paraspinal Muscle Stiffness

Sponsor: University of Primorska • ClinicalTrials.gov ID: NCT07826260

Registry updated: 2026-09-17
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Description

This randomized controlled crossover study will investigate the immediate effect of central posteroanterior lumbar mobilization on the intrinsic stiffness of the erector spinae and multifidus muscles in healthy adults without low back pain. Twenty-four participants will complete two experimental visits in randomized order. During one visit, participants will receive Maitland Grade III++ central posteroanterior mobilization at the L4 vertebral level, while during the other visit they will receive a sham mobilization condition involving gentle rhythmic pressure. Muscle stiffness will be assessed using shear wave elastography immediately before and after each intervention.

Interventions

  • Maitland Grade III++ Central Posteroanterior Mobilization (Procedure)
    Central posteroanterior mobilization is applied over the L4 spinous process with the participant in a prone position. The intervention consists of three 60-second sets of passive rhythmic oscillatory pressures performed at approximately 2 Hz, with 30-second rest periods between sets, resulting in approximately 360 oscillatory pressures in total.
  • Sham Lumbar Mobilization (Procedure)
    Sham mobilization is applied over the L4 spinous process with the participant in a prone position. The procedure consists of three 60-second sets of gentle rhythmic pressures with 30-second rest periods between sets. The timing and therapist contact are matched to the experimental condition, while substantial mobilization pressure is avoided.

Eligibility criteria

Inclusion Criteria: * Men and women aged 21 to 38 years. * Resident of the Republic of Slovenia. * No current low back pain. * No contraindications to lumbar manual mobilization. * Ability to assume and maintain the required prone testing position. * Provision of written informed consent. Exclusion Criteria: * Current low back pain. * Spondylolisthesis. * Severe osteoporosis. * Spinal stenosis. * Lumboischialgia or other significant structural spinal deformity. * Fibromyalgia. * Recent spinal surgery or lumbar spinal fixation. * Cauda equina syndrome. * Nerve root compression associated with neurological deficits. * Malignancy. * Recent relevant trauma. * Joint instability. * Active rheumatoid arthritis. * Acute local or systemic infection. * Long-term local corticosteroid use. * Inability to assume or maintain the required testing position.

Conditions

Muscle Stiffness

Locations

  • University of Primorska, Faculty of Health Sciences, Izola — Izola, Slovenia
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Official Source

Data sourced from ClinicalTrials.gov, a service of the U.S. National Institutes of Health.

View Official Record