Effect of Altered Mechanical Loading in ACLR
Effect of Altered Mechanical Loading on Lower Extremity Biomechanics and Biochemical Markers in Individuals With an Anterior Cruciate Ligament Reconstruction
Descripción general del estudio
Estado
Estado
Condiciones
Condiciones
Intervención / Tratamiento
Intervención / Tratamiento
Descripción detallada
Tipo de estudio
Tipo de estudio
Inscripción (Actual)
Inscripción
Fase
Fase
- No aplica
Criterios de participación
Criterio de elegibilidad
Criterio de elegibilidad
Edades elegibles para estudiar
Acepta Voluntarios Saludables
Géneros elegibles para el estudio
Descripción
Inclusion Criteria:
- Have a history of a primary, unilateral ACLR using either a hamstring or patellar tendon autograft, cleared by a physical for full return to physical activity with no limitations, and participate in at least 30 minutes of physical activity 3 times per week
Exclusion Criteria:
- History of injury to either leg, other than ACLR (e.g. ankle sprain, muscle strain), within 6 months prior to participation in the study, history of lower extremity surgery other than ACLR, history of osteoarthritis or current symptoms related to knee osteoarthritis (e.g. pain, swelling, stiffness), currently pregnant, or planning to become pregnant while enrolled in the study, cardiovascular restrictions that limit the participant's ability to participate in physical activity.
Plan de estudios
¿Cómo está diseñado el estudio?
Detalles de diseño
- Propósito principal: Ciencia básica
- Asignación: Aleatorizado
- Modelo Intervencionista: Asignación cruzada
- Enmascaramiento: Único
Número de brazos
Armas e Intervenciones
Grupo de participantes/brazoGrupo de participantes/brazo |
Intervención / TratamientoIntervención / Tratamiento |
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Experimental: Overloading
Participants will walk on a force-instrumented treadmill for 20 minutes and will be provided visual biofeedback consisting of bilateral vertical ground reaction force.
A target will be placed at 10% greater than the participant's baseline vertical ground reaction force.
Participants will be asked to alter their walking gait in an attempt to reach the target line with each step.
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A custom written MatLab script will sample bilateral peak vertical ground reaction forces and display the magnitude in real time on a screen placed in front of the participant.
A target line will be placed in the middle of the screen which corresponds to one of the three loading conditions.
Participants will be instructed to alter their movement in an attempt to match each limb's vertical ground reaction force to the target line.
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Experimental: Underloading
Participants will walk on a force-instrumented treadmill for 20 minutes and will be provided visual biofeedback consisting of bilateral vertical ground reaction force.
A target will be placed at 10% lower than the participant's baseline vertical ground reaction force.
Participants will be asked to alter their walking gait in an attempt to reach the target line with each step.
|
A custom written MatLab script will sample bilateral peak vertical ground reaction forces and display the magnitude in real time on a screen placed in front of the participant.
A target line will be placed in the middle of the screen which corresponds to one of the three loading conditions.
Participants will be instructed to alter their movement in an attempt to match each limb's vertical ground reaction force to the target line.
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Experimental: Average
Participants will walk on a force-instrumented treadmill for 20 minutes and will be provided visual biofeedback consisting of bilateral vertical ground reaction force.
A target will be placed at the average of each participant's baseline vertical ground reaction force between limbs.
Participants will be asked to alter their walking gait in an attempt to reach the target line with each step.
|
A custom written MatLab script will sample bilateral peak vertical ground reaction forces and display the magnitude in real time on a screen placed in front of the participant.
A target line will be placed in the middle of the screen which corresponds to one of the three loading conditions.
Participants will be instructed to alter their movement in an attempt to match each limb's vertical ground reaction force to the target line.
|
|
Sin intervención: Control
Participants will walk for 20 minutes on a force-instrumented treadmill and will not be provided biofeedback.
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¿Qué mide el estudio?
Medidas de resultado primarias
Medidas de resultado primarias
Medida de resultado |
Periodo de tiempo |
|---|---|
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Difference in acquisition as measured in root mean square error (RMSE) between loading conditions
Periodo de tiempo: Change in acquisition over 20 minute intervention
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Change in acquisition over 20 minute intervention
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Difference in joint loading as measured in peak vertical ground reaction force normalized to body weight (xBW) between loading conditions
Periodo de tiempo: Change in joint loading over 20 minute intervention
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Change in joint loading over 20 minute intervention
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Difference in cartilage turnover as measured in serum concentration of cartilage oligomeric matrix protein (pg/mL) between loading conditions
Periodo de tiempo: Chance in cartilage turnover over 20 minute intervention
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Chance in cartilage turnover over 20 minute intervention
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Colaboradores e Investigadores
Patrocinador
Patrocinador
Investigadores
Investigadores
- Investigador principal: Brian Pietrosimone, PhD, University of North Carolina, Chapel Hill
Publicaciones y enlaces útiles
Publicaciones Generales
- Luc-Harkey BA, Franz J, Hackney AC, Blackburn JT, Padua DA, Schwartz T, Davis-Wilson H, Spang J, Pietrosimone B. Immediate Biochemical Changes After Gait Biofeedback in Individuals With Anterior Cruciate Ligament Reconstruction. J Athl Train. 2020 Oct 1;55(10):1106-1115. doi: 10.4085/1062-6050-0372.19.
- Luc-Harkey BA, Franz JR, Blackburn JT, Padua DA, Hackney AC, Pietrosimone B. Real-time biofeedback can increase and decrease vertical ground reaction force, knee flexion excursion, and knee extension moment during walking in individuals with anterior cruciate ligament reconstruction. J Biomech. 2018 Jul 25;76:94-102. doi: 10.1016/j.jbiomech.2018.05.043. Epub 2018 Jun 15.
Fechas de registro del estudio
Fechas importantes del estudio
Inicio del estudio
Inicio del estudio
Finalización primaria (Actual)
Finalización primaria
Finalización del estudio (Actual)
Finalización del estudio
Fechas de registro del estudio
Enviado por primera vez
Enviado por primera vez
Primero enviado que cumplió con los criterios de control de calidad
Primero enviado que cumplió con los criterios de control de calidad
Publicado por primera vez (Estimar)
Publicado por primera vez
Actualizaciones de registros de estudio
Última actualización publicada (Actual)
Última actualización publicada
Última actualización enviada que cumplió con los criterios de control de calidad
Última actualización enviada que cumplió con los criterios de control de calidad
Última verificación
Última verificación
Más información
Términos relacionados con este estudio
Otros números de identificación del estudio
Otros números de identificación del estudio
- 16-0409
Plan de datos de participantes individuales (IPD)
¿Planea compartir datos de participantes individuales (IPD)?
Información sobre medicamentos y dispositivos, documentos del estudio
Estudia un producto farmacéutico regulado por la FDA de EE. UU.
Estudia un producto de dispositivo regulado por la FDA de EE. UU.
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