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Anchoring and Postural Stability

17. September 2026 aktualisiert von: William J. Hanney, University of Central Florida

Anchoring and Its Effects on Postural Stability

This study will compare standing balance in adults ages 18 to 50 during normal standing, inward anchoring, and outward anchoring. Anchoring involves standing with the feet wider than shoulder width and trying to pull the legs together or push them apart without moving the feet. Participants will complete all three conditions in a randomly assigned order. A researcher will use a handheld force-measuring instrument at six points on the pelvis to measure how much pressure participants can resist before a foot lifts from the floor. Participants will also rate how stable they feel after each anchoring condition. The first 18 participants will repeat assessments to evaluate measurement consistency. Participation is expected to last 60 minutes, or 90 minutes for those completing repeat assessments.

Studienübersicht

Status

Rekrutierung

Bedingungen

Intervention / Behandlung

Detaillierte Beschreibung

The study will enroll 72 adults from the University of Central Florida community. Participants will be randomized with equal probability to one of six counterbalanced orders of normal stance, inward anchoring, and outward anchoring. Every participant will complete all three conditions.

Inward anchoring involves attempting to draw the legs toward one another without moving the feet. Outward anchoring involves attempting to press the legs away from one another without moving the feet. Both anchoring conditions use a stance wider than shoulder width. Participants will wear their usual athletic footwear.

The same tester will apply a microFET2 handheld dynamometer at the right and left anterior superior iliac spines, iliac crests, and posterior superior iliac spines. Applied pressure will increase until the sole of the foot closest to the tester leaves the floor, at which point force will be recorded in newtons. Each site will be tested three times in each stance. Rest periods will be one minute between sets within a stance and two minutes between stances. Instructions for the next stance will be given during the final minute of the between-stance rest period.

After each anchoring condition, participants will rate perceived stability. The first 18 participants will complete additional repeat assessments for intrarater reliability analysis. The protocol plans repeated-measures analyses for stance/order comparisons and intraclass correlation coefficients for reliability.

Studientyp

Interventionell

Einschreibung (Geschätzt)

72

Phase

  • Unzutreffend

Kontakte und Standorte

Dieser Abschnitt enthält die Kontaktdaten derjenigen, die die Studie durchführen, und Informationen darüber, wo diese Studie durchgeführt wird.

Studienkontakt

Studienorte

    • Florida
      • Orlando, Florida, Vereinigte Staaten, 32816
        • Rekrutierung
        • University of Central Florida Spine and Mobility Lab
        • Kontakt:

Teilnahmekriterien

Forscher suchen nach Personen, die einer bestimmten Beschreibung entsprechen, die als Auswahlkriterien bezeichnet werden. Einige Beispiele für diese Kriterien sind der allgemeine Gesundheitszustand einer Person oder frühere Behandlungen.

Zulassungskriterien

Studienberechtigtes Alter

18 Jahre bis 50 Jahre (Erwachsene)

Akzeptiert gesunde Freiwillige

Ja

Studienberechtigte Geschlechter

Alle

Beschreibung

Inclusion Criteria:

  • Adults aged 18-50 years.
  • Able to provide informed consent and independently read, write, and communicate in English.

Exclusion Criteria:

  • History of neurological or vestibular conditions affecting balance, such as stroke, Parkinson's disease, multiple sclerosis, or vertigo, or uncorrected/inadequately corrected visual deficits affecting postural control.
  • Lower-extremity or spinal injury, orthopedic surgery, or a musculoskeletal condition within the past 6-12 months that may affect balance, force production, or safe participation.
  • Current pain or dysfunction limiting safe standing or weight-bearing tasks.
  • Use of medications that may affect balance, coordination, or muscle performance, such as muscle relaxants, opioids, or sedatives.
  • A cardiovascular or systemic condition that makes participation unsafe, such as uncontrolled hypertension, dizziness, or syncope, or inability to stand independently for the duration of testing.

Studienplan

Dieser Abschnitt enthält Einzelheiten zum Studienplan, einschließlich des Studiendesigns und der Messung der Studieninhalte.

Wie ist die Studie aufgebaut?

Designdetails

  • Hauptzweck: Screening
  • Zuteilung: Zufällig
  • Interventionsmodell: Crossover-Aufgabe
  • Maskierung: Doppelt

Waffen und Interventionen

Teilnehmergruppe / Arm
Intervention / Behandlung
Experimental: Normal Stance → Inward Anchoring → Outward Anchoring

Participants complete normal stance, then inward anchoring, then outward anchoring. The same force assessments are performed in each condition, with two minutes of rest between conditions.

Participants stand normally while the tester performs the protocol's pelvic force assessments. This condition provides the within-participant comparison for the two anchoring techniques

Participants stand upright with their feet wider than shoulder width and attempt to pull their legs toward each other without moving the feet. They maintain the position during the pelvic force assessments.

Participants stand upright with their feet wider than shoulder width and attempt to push their legs away from each other without moving the feet. They maintain the position during the pelvic force assessments.

Experimental: Normal Stance → Outward Anchoring → Inward Anchoring

Participants complete normal stance, then outward anchoring, then inward anchoring. The same force assessments are performed in each condition, with two minutes of rest between conditions.

Participants stand normally while the tester performs the protocol's pelvic force assessments. This condition provides the within-participant comparison for the two anchoring techniques

Participants stand upright with their feet wider than shoulder width and attempt to pull their legs toward each other without moving the feet. They maintain the position during the pelvic force assessments.

Participants stand upright with their feet wider than shoulder width and attempt to push their legs away from each other without moving the feet. They maintain the position during the pelvic force assessments.

Experimental: Outward Anchoring → Normal Stance → Inward Anchoring

Participants complete outward anchoring, then normal stance, then inward anchoring. The same force assessments are performed in each condition, with two minutes of rest between conditions.

Participants stand normally while the tester performs the protocol's pelvic force assessments. This condition provides the within-participant comparison for the two anchoring techniques

Participants stand upright with their feet wider than shoulder width and attempt to pull their legs toward each other without moving the feet. They maintain the position during the pelvic force assessments.

Participants stand upright with their feet wider than shoulder width and attempt to push their legs away from each other without moving the feet. They maintain the position during the pelvic force assessments.

Experimental: Outward Anchoring → Inward Anchoring → Normal Stance

Participants complete outward anchoring, then inward anchoring, then normal stance. The same force assessments are performed in each condition, with two minutes of rest between conditions.

Participants stand normally while the tester performs the protocol's pelvic force assessments. This condition provides the within-participant comparison for the two anchoring techniques

Participants stand upright with their feet wider than shoulder width and attempt to pull their legs toward each other without moving the feet. They maintain the position during the pelvic force assessments.

Participants stand upright with their feet wider than shoulder width and attempt to push their legs away from each other without moving the feet. They maintain the position during the pelvic force assessments.

Experimental: Inward Anchoring → Normal Stance → Outward Anchoring

Participants complete inward anchoring, then normal stance, then outward anchoring. The same force assessments are performed in each condition, with two minutes of rest between conditions.

Participants stand normally while the tester performs the protocol's pelvic force assessments. This condition provides the within-participant comparison for the two anchoring techniques

Participants stand upright with their feet wider than shoulder width and attempt to pull their legs toward each other without moving the feet. They maintain the position during the pelvic force assessments.

Participants stand upright with their feet wider than shoulder width and attempt to push their legs away from each other without moving the feet. They maintain the position during the pelvic force assessments.

Experimental: Inward Anchoring → Outward Anchoring → Normal Stance

Participants complete inward anchoring, then outward anchoring, then normal stance. The same force assessments are performed in each condition, with two minutes of rest between conditions.

Participants stand normally while the tester performs the protocol's pelvic force assessments. This condition provides the within-participant comparison for the two anchoring techniques

Participants stand upright with their feet wider than shoulder width and attempt to pull their legs toward each other without moving the feet. They maintain the position during the pelvic force assessments.

Participants stand upright with their feet wider than shoulder width and attempt to push their legs away from each other without moving the feet. They maintain the position during the pelvic force assessments.

Was misst die Studie?

Primäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Mean Break-Point Force at the Right Anterior Superior Iliac Spine
Zeitfenster: Day 1

A microFET2 handheld dynamometer is applied at the right anterior superior iliac spine during normal stance, inward anchoring, and outward anchoring. Force in newtons is recorded when the sole of the foot closest to the tester leaves the floor. Three readings are collected per stance

Day 1
Mean Break-Point Force at the Left Anterior Superior Iliac Spine
Zeitfenster: Day 1

A microFET2 handheld dynamometer is applied at the left anterior superior iliac spine during normal stance, inward anchoring, and outward anchoring. Force in newtons is recorded when the sole of the foot closest to the tester leaves the floor. Three readings are collected per stance.

Day 1
Mean Break-Point Force at the Right Iliac Crest
Zeitfenster: Day 1

A microFET2 handheld dynamometer is applied at the right iliac crest during normal stance, inward anchoring, and outward anchoring. Force in newtons is recorded when the sole of the foot closest to the tester leaves the floor. Three readings are collected per stance

Day 1
Mean Break-Point Force at the Left Iliac Crest
Zeitfenster: Day 1

A microFET2 handheld dynamometer is applied at the left iliac crest during normal stance, inward anchoring, and outward anchoring. Force in newtons is recorded when the sole of the foot closest to the tester leaves the floor. Three readings are collected per stance.

Day 1
Mean Break-Point Force at the Right Posterior Superior Iliac Spine
Zeitfenster: Day 1

A microFET2 handheld dynamometer is applied at the right posterior superior iliac spine during normal stance, inward anchoring, and outward anchoring. Force in newtons is recorded when the sole of the foot closest to the tester leaves the floor. Three readings are collected per stance.

Day 1
Mean Break-Point Force at the Left Posterior Superior Iliac Spine
Zeitfenster: Day 1

A microFET2 handheld dynamometer is applied at the left posterior superior iliac spine during normal stance, inward anchoring, and outward anchoring. Force in newtons is recorded when the sole of the foot closest to the tester leaves the floor. Three readings are collected per stance.

Day 1
Perceived Stability Rating After Inward Anchoring
Zeitfenster: Day 1

After inward anchoring, participants answer how stable they felt during that stance. Ratings range from 0 (not at all stable) to 10 (completely stable); 5 means neutral, or the same stability as normal standing. Higher scores indicate greater perceived stability.

Day 1
Perceived Stability Rating After Outward Anchoring
Zeitfenster: Day 1

After outward anchoring, participants answer how stable they felt during that stance. Ratings range from 0 (not at all stable) to 10 (completely stable); 5 means neutral, or the same stability as normal standing. Higher scores indicate greater perceived stability

Day 1

Mitarbeiter und Ermittler

Hier finden Sie Personen und Organisationen, die an dieser Studie beteiligt sind.

Sponsor

Ermittler

  • Hauptermittler: William J Hanney, PhD, University of Central Florida

Publikationen und hilfreiche Links

Die Bereitstellung dieser Publikationen erfolgt freiwillig durch die für die Eingabe von Informationen über die Studie verantwortliche Person. Diese können sich auf alles beziehen, was mit dem Studium zu tun hat.

Allgemeine Veröffentlichungen

Studienaufzeichnungsdaten

Diese Daten verfolgen den Fortschritt der Übermittlung von Studienaufzeichnungen und zusammenfassenden Ergebnissen an ClinicalTrials.gov. Studienaufzeichnungen und gemeldete Ergebnisse werden von der National Library of Medicine (NLM) überprüft, um sicherzustellen, dass sie bestimmten Qualitätskontrollstandards entsprechen, bevor sie auf der öffentlichen Website veröffentlicht werden.

Haupttermine studieren

Studienbeginn (Tatsächlich)

23. August 2026

Primärer Abschluss (Geschätzt)

30. September 2027

Studienabschluss (Geschätzt)

2. Mai 2028

Studienanmeldedaten

Zuerst eingereicht

9. September 2026

Zuerst eingereicht, das die QC-Kriterien erfüllt hat

17. September 2026

Zuerst gepostet (Tatsächlich)

24. September 2026

Studienaufzeichnungsaktualisierungen

Letztes Update gepostet (Tatsächlich)

24. September 2026

Letztes eingereichtes Update, das die QC-Kriterien erfüllt

17. September 2026

Zuletzt verifiziert

1. September 2026

Mehr Informationen

Begriffe im Zusammenhang mit dieser Studie

Andere Studien-ID-Nummern

  • 9152

Plan für individuelle Teilnehmerdaten (IPD)

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Arzneimittel- und Geräteinformationen, Studienunterlagen

Studiert ein von der US-amerikanischen FDA reguliertes Arzneimittelprodukt

Nein

Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt

Nein

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