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Immediate Effect of Lumbar Mobilization on Paraspinal Muscle Stiffness

11. september 2026 opdateret af: Žiga Kozinc, University of Primorska

Immediate Effect of Maitland Grade III++ Central Posteroanterior Mobilization on Erector Spinae and Multifidus Muscle Stiffness in Healthy Adults: A Randomized Crossover Trial

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.

Studieoversigt

Status

Rekruttering

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

The study will be designed as a randomized controlled crossover trial to investigate the immediate effects of manual spinal mobilization on lumbar paraspinal muscle stiffness in healthy adults without low back pain. Each participant will attend two separate study visits and will receive both experimental conditions in a randomized order.

In the experimental condition, Maitland Grade III++ central posteroanterior mobilization will be applied over the spinous process of L4. The intervention will consist of three 60-second sets of passive rhythmic oscillatory pressures performed at approximately 2 Hz, with 30-second rest periods between sets. In the control condition, participants will receive a sham mobilization presented as a Grade I mobilization technique. The sham intervention will follow the same timing structure but will consist of gentle rhythmic pressure over the L4 spinous process.

Intrinsic muscle stiffness of the right erector spinae and multifidus muscles will be assessed using shear wave elastography. Three measurements will be obtained immediately before and after each intervention, and the mean value will be expressed in kilopascals. Measurements will be performed in a standardized prone position at the L4-L5 level.

Undersøgelsestype

Interventionel

Tilmelding (Anslået)

25

Fase

  • Ikke anvendelig

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiekontakt

Studiesteder

  • Slovenien
      • Izola, Slovenien, 6310
        • Rekruttering
        • University of Primorska, Faculty of Health Sciences, Izola
        • Kontakt:

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

  • Voksen

Tager imod sunde frivillige

Ja

Beskrivelse

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.

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Grundvidenskab
  • Tildeling: Randomiseret
  • Interventionel model: Crossover opgave
  • Maskning: Enkelt

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: Mobilization-Sham Sequence
Participants receive Maitland Grade III++ central posteroanterior mobilization during the first study visit and sham mobilization during the second study visit.
Procedure: Maitland Grade III++ Central Posteroanterior Mobilization
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.
Procedure: Sham Lumbar Mobilization
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.
Aktiv komparator: Sham-Mobilization Sequence
Participants receive sham mobilization during the first study visit and Maitland Grade III++ central posteroanterior mobilization during the second study visit.
Procedure: Maitland Grade III++ Central Posteroanterior Mobilization
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.
Procedure: Sham Lumbar Mobilization
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.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Change in Erector Spinae Muscle Stiffness
Tidsramme: Immediately before and immediately after each intervention session
Intrinsic stiffness of the right erector spinae muscle is assessed using shear wave elastography and expressed as shear modulus in kilopascals (kPa). Three measurements are obtained at each time point and averaged. The outcome is the change from the pre-intervention to the immediate post-intervention measurement.
Immediately before and immediately after each intervention session
Change in Multifidus Muscle Stiffness
Tidsramme: Immediately before and immediately after each intervention session
Intrinsic stiffness of the right multifidus muscle is assessed using shear wave elastography and expressed as shear modulus in kilopascals (kPa). Three measurements are obtained at each time point and averaged. The outcome is the change from the pre-intervention to the immediate post-intervention measurement.
Immediately before and immediately after each intervention session

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Change in Erector Spinae Muscle Stiffness Assessed by Myotonometry
Tidsramme: Immediately before and immediately after each intervention session
Myotonometry will be used to assess mechanical muscle stiffness at the same measurement location used for the erector spinae shear wave elastography assessment. Measurements will be performed immediately before and after each intervention condition. The outcome will be the change in muscle stiffness from pre-intervention to immediate post-intervention.
Immediately before and immediately after each intervention session
Change in Multifidus Muscle Stiffness Assessed by Myotonometry
Tidsramme: Immediately before and immediately after each intervention session
Myotonometry will be used to assess mechanical muscle stiffness at the same measurement location used for the multifidus shear wave elastography assessment. Measurements will be performed immediately before and after each intervention condition. The outcome will be the change in muscle stiffness from pre-intervention to immediate post-intervention.
Immediately before and immediately after each intervention session

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

University of Primorska

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Anslået)

30. september 2026

Primær færdiggørelse (Anslået)

26. november 2026

Studieafslutning (Anslået)

30. november 2026

Datoer for studieregistrering

Først indsendt

11. september 2026

Først indsendt, der opfyldte QC-kriterier

11. september 2026

Først opslået (Faktiske)

17. september 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

17. september 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

11. september 2026

Sidst verificeret

1. september 2026

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Andre undersøgelses-id-numre

  • UP-FHS-PA-SWE-2026

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

JA

IPD-planbeskrivelse

De-identified individual participant data underlying the results reported in subsequent publications may be made available upon reasonable request to the study investigators. Data will be shared for scientifically justified purposes following approval by the investigators and, where appropriate, completion of a data-sharing agreement.

IPD-delingstidsramme

Data will be available following publication of the main study results and will remain available for at least 5 years.

IPD-delingsadgangskriterier

Researchers with a scientifically justified proposal may request access. Requests will be reviewed by the study investigators and data will be shared in de-identified form subject to applicable ethical and data-protection requirements.

IPD-deling Understøttende informationstype

  • STUDY_PROTOCOL
  • SAP
  • ICF

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