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Low Back Pain and Hamstring-to-Quadriceps Strength Ratio in Military Personnel (LBP-H/Q ratio)

18. maj 2026 opdateret af: Vilma Dudoniene, Lithuanian Sports University

Association Between Low Back Pain and Hamstring-to-Quadriceps Strength Ratio in Lithuanian National Defence Volunteer Forces Personnel

The aim of this study was to determine the association between low back pain and the strength of knee flexor and extensor muscles in Lithuanian National Defence Volunteer Forces personnel.

Studieoversigt

Status

Afsluttet

Betingelser

Detaljeret beskrivelse

This cross-sectional study investigated the association between low back pain (LBP) and the hamstring-to-quadriceps (H/Q) strength ratio in personnel of the Lithuanian National Defence Volunteer Forces. Active-duty volunteers with and without LBP underwent isokinetic testing of knee flexor and extensor muscle strength using a Biodex System 4 Pro dynamometer at angular velocities of 60°/s and 120°/s. Hamstring strength, quadriceps strength, H/Q ratios, and inter-limb asymmetries were assessed to explore potential associations with low back pain in this military population.

Undersøgelsestype

Observationel

Tilmelding (Faktiske)

71

Kontakter og lokationer

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

Studiesteder

  • Litauen
    • LT
      • Kaunas, LT, Litauen, 44221
        • Department of health promotion and rehabilitation

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

  • Barn
  • Voksen
  • Ældre voksen

Tager imod sunde frivillige

Ja

Prøveudtagningsmetode

Ikke-sandsynlighedsprøve

Studiebefolkning

The study population included active-duty Lithuanian National Defence Volunteer Forces personnel recruited for participation in this cross-sectional analysis

Beskrivelse

Inclusion Criteria:

  • The study participants consisted of a targeted population of Lithuanian National Defence Volunteer Forces personnel

Exclusion Criteria:

  • Individuals with a clinically diagnosed low back pain disorder or acute episodes of low back pain were excluded

Studieplan

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

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

Kohorter og interventioner

Gruppe / kohorte
Military personnel
Targeted population of Lithuanian National Defence Volunteer Forces personnel

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Low back pain prevalence
Tidsramme: Baseline
Participants were asked whether they had experienced low back pain during the past 12 months (yes/no). Participants who responded "yes" were classified into the low back pain group.
Baseline
Low back pain intensity
Tidsramme: Baseline
LBP intensity was assessed using the Visual Analogue Scale (VAS, 0-10) , where 0 - no pain, and 10 - worst imaginable pain.
Baseline
Low back pain duration
Tidsramme: Baseline
Participants were asked to indicate LBP duration. LBP pain duration was classified as acute (<3 months) or chronic (≥3 months)
Baseline
Muscle strength peak torque
Tidsramme: Baseline

Muscle strength was assessed using the Biodex System 4 isokinetic dynamometer. Participants were instructed to avoid vigorous physical activity 24 hours before testing and refrain from eating for at least 2 hours prior to assessment. A 10-minute warm-up on a cycle ergometer (50-60 W) and light dynamic exercises were performed before testing. Participants were seated with the backrest at 85° and hip flexion at 90°. The dynamometer axis was aligned with the lateral femoral epicondyle, and the lower leg was secured 2-3 cm above the ankle. The range of motion was set from 70° knee flexion to full extension. The trunk and tested limb were stabilized using straps.

Testing included 5 repetitions at 60°/s and 10 repetitions at 120°/s, with a 30-second rest interval between sets. Prior to testing, participants performed 3-5 familiarization repetitions.

Peak torque normalized to body weight (Nm/kg) was recorded.
Baseline
Average torque
Tidsramme: Baseline
Was measured in Nm
Baseline
Muscle power
Tidsramme: Baseline
in W
Baseline
Body weight
Tidsramme: Baseline
Measured in kg
Baseline
Body height
Tidsramme: Baseline
Measured in meters
Baseline
Age
Tidsramme: Baseline
Measured in years
Baseline

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Previous injuries
Tidsramme: Baseline
Participants were asked whether they had lumbar or lower limb injuries during the past 12 months that could influence the results (yes / no).
Baseline

Samarbejdspartnere og efterforskere

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

Sponsor

Lithuanian Sports University

Publikationer og nyttige links

Den person, der er ansvarlig for at indtaste oplysninger om undersøgelsen, leverer frivilligt disse publikationer. Disse kan handle om alt relateret til undersøgelsen.

Generelle publikationer

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 (Faktiske)

1. januar 2026

Primær færdiggørelse (Faktiske)

5. januar 2026

Studieafslutning (Faktiske)

22. april 2026

Datoer for studieregistrering

Først indsendt

24. april 2026

Først indsendt, der opfyldte QC-kriterier

18. maj 2026

Først opslået (Faktiske)

26. maj 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

26. maj 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

18. maj 2026

Sidst verificeret

1. januar 2026

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • Lithuanian Sports University31

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

UBESLUTET

IPD-planbeskrivelse

Individual participant data (IPD) will not be publicly shared due to ethical and privacy restrictions related to participant confidentiality and informed consent agreements.Military personnel is sensitive

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

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Sponsorer og samarbejdspartnere

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Betingelser

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Narkotikainterventioner

Kosttilskud

Sponsor / samarbejdspartnere

Placeringer

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