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Anchoring and Postural Stability

17 de setembro de 2026 atualizado por: 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.

Visão geral do estudo

Status

Recrutamento

Condições

Intervenção / Tratamento

Descrição detalhada

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.

Tipo de estudo

Intervencional

Inscrição (Estimado)

72

Estágio

  • Não aplicável

Contactos e Locais

Esta seção fornece os detalhes de contato para aqueles que conduzem o estudo e informações sobre onde este estudo está sendo realizado.

Contato de estudo

Locais de estudo

    • Florida
      • Orlando, Florida, Estados Unidos, 32816
        • Recrutamento
        • University of Central Florida Spine and Mobility Lab
        • Contato:

Critérios de participação

Os pesquisadores procuram pessoas que se encaixem em uma determinada descrição, chamada de critérios de elegibilidade. Alguns exemplos desses critérios são a condição geral de saúde de uma pessoa ou tratamentos anteriores.

Critérios de elegibilidade

Idades elegíveis para estudo

18 anos a 50 anos (Adulto)

Aceita Voluntários Saudáveis

Sim

Gêneros Elegíveis para o Estudo

Tudo

Descrição

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.

Plano de estudo

Esta seção fornece detalhes do plano de estudo, incluindo como o estudo é projetado e o que o estudo está medindo.

Como o estudo é projetado?

Detalhes do projeto

  • Finalidade Principal: Triagem
  • Alocação: Randomizado
  • Modelo Intervencional: Atribuição cruzada
  • Mascaramento: Dobro

Armas e Intervenções

Grupo de Participantes / Braço
Intervenção / Tratamento
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.

O que o estudo está medindo?

Medidas de resultados primários

Medida de resultado
Descrição da medida
Prazo
Mean Break-Point Force at the Right Anterior Superior Iliac Spine
Prazo: 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
Prazo: 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
Prazo: 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
Prazo: 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
Prazo: 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
Prazo: 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
Prazo: 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
Prazo: 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

Colaboradores e Investigadores

É aqui que você encontrará pessoas e organizações envolvidas com este estudo.

Patrocinador

Investigadores

  • Investigador principal: William J Hanney, PhD, University of Central Florida

Publicações e links úteis

A pessoa responsável por inserir informações sobre o estudo fornece voluntariamente essas publicações. Estes podem ser sobre qualquer coisa relacionada ao estudo.

Publicações Gerais

Datas de registro do estudo

Essas datas acompanham o progresso do registro do estudo e os envios de resumo dos resultados para ClinicalTrials.gov. Os registros do estudo e os resultados relatados são revisados ​​pela National Library of Medicine (NLM) para garantir que atendam aos padrões específicos de controle de qualidade antes de serem publicados no site público.

Datas Principais do Estudo

Início do estudo (Real)

23 de agosto de 2026

Conclusão Primária (Estimado)

30 de setembro de 2027

Conclusão do estudo (Estimado)

2 de maio de 2028

Datas de inscrição no estudo

Enviado pela primeira vez

9 de setembro de 2026

Enviado pela primeira vez que atendeu aos critérios de CQ

17 de setembro de 2026

Primeira postagem (Real)

24 de setembro de 2026

Atualizações de registro de estudo

Última Atualização Postada (Real)

24 de setembro de 2026

Última atualização enviada que atendeu aos critérios de controle de qualidade

17 de setembro de 2026

Última verificação

1 de setembro de 2026

Mais Informações

Termos relacionados a este estudo

Outros números de identificação do estudo

  • 9152

Plano para dados de participantes individuais (IPD)

Planeja compartilhar dados de participantes individuais (IPD)?

NÃO

Informações sobre medicamentos e dispositivos, documentos de estudo

Estuda um medicamento regulamentado pela FDA dos EUA

Não

Estuda um produto de dispositivo regulamentado pela FDA dos EUA

Não

Essas informações foram obtidas diretamente do site clinicaltrials.gov sem nenhuma alteração. Se você tiver alguma solicitação para alterar, remover ou atualizar os detalhes do seu estudo, entre em contato com register@clinicaltrials.gov. Assim que uma alteração for implementada em clinicaltrials.gov, ela também será atualizada automaticamente em nosso site .