Neuroplastic Changes Due to an Exercise Intervention That Aid in Lower Limb Recovery After Subcortical Stroke
This study aims to develop imaging-based biomarkers to assess which chronic stroke participant with lower extremity disability may respond or resist high intensity interval training (HIIT).
Previous research suggests that physical exercise training is safe and could help improve the walking speed of non-ambulatory stroke survivors. However, inter-individual variability in response to exercise is extraordinarily high regardless of adherence, and predictors of response remain elusive.
Chronic stroke survivors with lower limb disability resulting in slow walking speeds will participate in 12 weeks of cycling exercise at Emory University under the guidance of a physical exercise instructor, 3 days a week, for 25-60 minutes. During some of the exercise sessions, the investigators will collect blood lactate with a finger prick. Brain scans with an MRI before and after the 12 weeks of exercise will be done; motor function tests that include walking, sitting down, standing up, and turning around will be collected. Participants' memory and thinking will be assessed, and participants will fill out questionnaires about their health before and after their stroke, and well as questions about their diet.
The participation will last between 14-16 weeks (up to 42 study visits).
Studienübersicht
Status
Status
Bedingungen
Bedingungen
Intervention / Behandlung
Intervention / Behandlung
Detaillierte Beschreibung
Studientyp
Studientyp
Einschreibung (Geschätzt)
Einschreibung
Phase
Phase
- Unzutreffend
Kontakte und Standorte
Studienkontakt
Studienkontakt
- Name: Susan Murphy
- Telefonnummer: 404-712-1928
- E-Mail: smurph7@emory.edu
Studieren Sie die Kontaktsicherung
- Name: Lisa Krishnamurthy, PhD
- Telefonnummer: 404-712-5332
- E-Mail: lkrish2@emory.edu
Studienorte
-
-
Georgia
-
Atlanta, Georgia, Vereinigte Staaten, 30322
- Rekrutierung
- Emory Rehabilitation Hospital
-
Kontakt:
- Susan Murphy
- Telefonnummer: 404-712-1928
- E-Mail: smurph7@emory.edu
-
Atlanta, Georgia, Vereinigte Staaten, 30322
- Rekrutierung
- Emory University Hospital
-
Kontakt:
- Susan Murphy
- Telefonnummer: 404-712-1928
- E-Mail: smurph7@emory.edu
-
-
Teilnahmekriterien
Zulassungskriterien
Zulassungskriterien
Studienberechtigtes Alter
- Erwachsene
- Älterer Erwachsener
Akzeptiert gesunde Freiwillige
Beschreibung
Inclusion Criteria:
- chronic left or right subcortical stroke as defined by 6 months or more after a cardiovascular accident
- lower extremity motor impairment due to stroke that causes a walking speed of less than 0.6 m/s during a 10m walk,
- age 18-80 years old, and
- Screen pass of the Stress test or Physician sign-off from the participant's health care team that they are cleared for a 12 week exercise intervention
Exclusion Criteria:
- MRI contraindications, including implanted cardiac pacemakers and severe claustrophobia
- any neurodegenerative condition other than stroke that may lead to lower extremity impairment
- visual or auditory impairment that may hinder study procedures, and
- any medical condition that would preclude from participation in a physical exercise intervention program.
Studienplan
Wie ist die Studie aufgebaut?
Designdetails
- Hauptzweck: Unterstützende Pflege
- Zuteilung: N / A
- Interventionsmodell: Einzelgruppenzuweisung
- Maskierung: Keine (Offenes Etikett)
Anzahl der Arme
Waffen und Interventionen
Teilnehmergruppe / ArmTeilnehmergruppe / Arm |
Intervention / BehandlungIntervention / Behandlung |
|---|---|
|
Experimental: HIIT intervention in chronic subcortical stroke participants
The HIIT consists of three weekly 25-60 minute cycling sessions for 12 weeks at Emory University, administered by a trained exercise physiologist, for a total of 36 HIIT sessions.
|
Three weekly 25-60 minute cycling sessions for 12 weeks for a total of 36 HIIT sessions. Each exercise session will start with a 5 minute warm up, followed by 20 minutes or more of moderate to intense cycling. Each session, the time will increase by one minute. The trained exercise physiologist may ask the participant to cruise (cycle at a comfortable pace), sprint (cycle faster), or climb (increase gear) in order to generate intervals of moderate and high intensity exercise during the session. During HIIT sessions 1, 4, 7, 10, and 28 the participant's blood lactate will be measured via finger prick 7 times each session (for a total of 35 finger pricks) to assess if their lactate threshold is surpassed during HIIT. One week before the intervention and one week after, the participant will be asked to take part in an assessment of lower extremity motor function including walking speed, and a 90-minute MRI session for a brain scan. |
Was misst die Studie?
Primäre Ergebnismessungen
Primäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
|
Walking Speed Assessed by the 10-Meter Walk Test (10MWT)
Zeitfenster: 12 weeks post-intervention
|
Walking speed will be measured using the 10-Meter Walk Test (10MWT).
Participants will be instructed to walk a measured 10-meter distance at their comfortable walking speed.
The time required to traverse the designated distance will be recorded using a stopwatch, and walking speed will be calculated as distance divided by time and expressed in meters per second (m/s).
Higher values indicate faster walking speed and improved ambulatory function.
|
12 weeks post-intervention
|
Sekundäre Ergebnismessungen
Sekundäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
|
Functional Mobility Assessed by the Timed Up and Go Test (TUG)
Zeitfenster: 12 weeks post-intervention
|
Functional mobility will be measured using the Timed Up and Go (TUG) test.
Participants will be instructed to rise from a standard chair, walk 3 meters at a safe and comfortable pace, turn around, walk back to the chair, and sit down.
The time required to complete the task will be recorded using a stopwatch and expressed in seconds (s).
Lower completion times indicate better functional mobility and dynamic balance.
|
12 weeks post-intervention
|
|
Walking Endurance Assessed by the 6-Minute Walk Test (6MWT)
Zeitfenster: 12 weeks post-intervention
|
Walking endurance will be measured using the 6-Minute Walk Test (6MWT).
Participants will be instructed to walk as far as possible along a designated walkway for 6 minutes at a self-selected pace, with rest periods permitted as needed according to standardized testing procedures.
The total distance walked during the 6-minute period will be recorded and expressed in meters (m).
Greater distances indicate better walking endurance and functional exercise capacity.
|
12 weeks post-intervention
|
|
Change in Resting-State Functional Connectivity of the Cognitive-Motor Network Assessed by MRI
Zeitfenster: Baseline, 12 weeks post-intervention
|
Brain function will be assessed using resting-state functional magnetic resonance imaging (rsfMRI) acquired before and after the 12-week high-intensity interval training (HIIT) intervention.
Functional connectivity will be quantified using echo-planar time-resolved imaging (EPTI) and expressed as z-transformed correlation values.
|
Baseline, 12 weeks post-intervention
|
Andere Ergebnismessungen
Andere Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
|
Blood Lactate Levels
Zeitfenster: Baseline, 12 weeks post-intervention
|
Blood lactate levels in Millimoles per liter (mmol/L) will be measured at baseline and post-intervention.
|
Baseline, 12 weeks post-intervention
|
Mitarbeiter und Ermittler
Sponsor
Sponsor
Mitarbeiter
Mitarbeiter
Ermittler
Ermittler
- Hauptermittler: Lisa Krishnamurthy, PhD, Emory University
Studienaufzeichnungsdaten
Haupttermine studieren
Studienbeginn (Geschätzt)
Studienbeginn
Primärer Abschluss (Geschätzt)
Primärer Abschluss
Studienabschluss (Geschätzt)
Studienabschluss
Studienanmeldedaten
Zuerst eingereicht
Zuerst eingereicht
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst gepostet (Tatsächlich)
Zuerst gepostet
Studienaufzeichnungsaktualisierungen
Letztes Update gepostet (Tatsächlich)
Letztes Update gepostet
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Zuletzt verifiziert
Zuletzt verifiziert
Mehr Informationen
Begriffe im Zusammenhang mit dieser Studie
Schlüsselwörter
Zusätzliche relevante MeSH-Bedingungen
Andere Studien-ID-Nummern
Andere Studien-ID-Nummern
- 2025P010166
Plan für individuelle Teilnehmerdaten (IPD)
Planen Sie, individuelle Teilnehmerdaten (IPD) zu teilen?
Beschreibung des IPD-Plans
IPD-Sharing-Zeitrahmen
IPD-Sharing-Zugriffskriterien
Art der unterstützenden IPD-Freigabeinformationen
- STUDIENPROTOKOLL
Arzneimittel- und Geräteinformationen, Studienunterlagen
Studiert ein von der US-amerikanischen FDA reguliertes Arzneimittelprodukt
Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt
Diese Informationen wurden ohne Änderungen direkt von der Website clinicaltrials.gov abgerufen. Wenn Sie Ihre Studiendaten ändern, entfernen oder aktualisieren möchten, wenden Sie sich bitte an register@clinicaltrials.gov. Sobald eine Änderung auf clinicaltrials.gov implementiert wird, wird diese automatisch auch auf unserer Website aktualisiert .