Effects of the Q-Collar During High-Intensity Cycling Exercise
1 september 2026 bijgewerkt door: University of Northern Iowa
Cardiovascular, Cerebral, and Performance Responses to Q-Collar™ Use in a 5-km Cycling Time Trial
This study examined the effects of wearing the Q-Collar during high-intensity cycling exercise.
Eleven recreationally trained male participants completed two 5-kilometer cycling time trials: one while wearing the Q-Collar and one without the Q-Collar.
During and after each trial, researchers measured cardiovascular responses, brain oxygenation, blood lactate, perceived exertion, cognitive performance, and cycling performance.
The purpose of the study was to determine whether wearing the Q-Collar affects physiological responses, cognitive function, or performance during high-intensity exercise.
Studie Overzicht
Toestand
Voltooid
Interventie / Behandeling
Gedetailleerde beschrijving
This randomized crossover study examined the effects of Q-Collar use during high-intensity cycling exercise. Recreationally trained male participants completed two laboratory testing sessions in randomized order: a 5-kilometer cycling time trial while wearing the Q-Collar and a 5-kilometer cycling time trial without the Q-Collar. The Q-Collar applies mild bilateral compression to the internal jugular veins and is designed to increase cerebral blood volume.
During each trial, cardiovascular responses were assessed continuously, while prefrontal cortex oxygenation was measured using functional near-infrared spectroscopy. Blood lactate and ratings of perceived exertion were assessed during exercise, and cognitive performance was evaluated before and after each cycling trial. Cycling performance was also recorded.
The study was designed to determine whether wearing the Q-Collar alters physiological responses to high-intensity exercise, particularly cardiovascular function and prefrontal cortex oxygenation, and whether these responses are accompanied by changes in cognitive or cycling performance. The crossover design allowed each participant to complete both conditions and therefore serve as his own control.
Studietype
Ingrijpend
Inschrijving (Werkelijk)
11
Fase
- Niet toepasbaar
Contacten en locaties
In dit gedeelte vindt u de contactgegevens van degenen die het onderzoek uitvoeren en informatie over waar dit onderzoek wordt uitgevoerd.
Studie Locaties
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Iowa
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Cedar Falls, Iowa, Verenigde Staten, 50614
- University of Northern Iowa
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Deelname Criteria
Onderzoekers zoeken naar mensen die aan een bepaalde beschrijving voldoen, de zogenaamde geschiktheidscriteria. Enkele voorbeelden van deze criteria zijn iemands algemene gezondheidstoestand of eerdere behandelingen.
Geschiktheidscriteria
Leeftijden die in aanmerking komen voor studie
- Volwassen
Accepteert gezonde vrijwilligers
Ja
Beschrijving
Inclusion Criteria:
- Male participants
- 18-35 years old
- Recreationally trained
- Provided written informed consent
- Achieved a maximal oxygen consumption (VO₂max) classified as "good" or "excellent" during cardiopulmonary exercise testing
Exclusion Criteria:
- Failure to meet the required "good" or "excellent" VO₂max classification during cardiopulmonary exercise testing
- Outside age range
Studie plan
Dit gedeelte bevat details van het studieplan, inclusief hoe de studie is opgezet en wat de studie meet.
Hoe is de studie opgezet?
Ontwerpdetails
- Primair doel: Fundamentele wetenschap
- Toewijzing: Gerandomiseerd
- Interventioneel model: Crossover-opdracht
- Masker: Geen (open label)
Wapens en interventies
Deelnemersgroep / Arm |
Interventie / Behandeling |
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Experimenteel: Q-Collar Then Control
Participants completed a 5-kilometer cycling time trial while wearing the Q-Collar, followed by a control 5-kilometer cycling time trial without the Q-Collar after a washout period of at least 72 hours.
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The Q-Collar™ is a wearable neck device that applies mild bilateral compression to the internal jugular veins.
Participants wore the Q-Collar during a 5-kilometer cycling time trial.
The device was individually fitted according to manufacturer guidelines and remained in place throughout the exercise trial.
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Experimenteel: Control Then Q-Collar
Participants completed a control 5-kilometer cycling time trial without the Q-Collar, followed by a 5-kilometer cycling time trial while wearing the Q-Collar after a washout period of at least 72 hours.
|
The Q-Collar™ is a wearable neck device that applies mild bilateral compression to the internal jugular veins.
Participants wore the Q-Collar during a 5-kilometer cycling time trial.
The device was individually fitted according to manufacturer guidelines and remained in place throughout the exercise trial.
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Wat meet het onderzoek?
Primaire uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
|---|---|---|
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Prefrontal Cortex Oxygenation
Tijdsspanne: All throughout each 5-kilometer cycling time trial, approximately 10 minutes
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Changes in prefrontal cortex oxygenated hemoglobin were continuously measured using functional near-infrared spectroscopy during 5-kilometer cycling time trials performed with and without the Q-Collar.
Data were evaluated across kilometer time points.
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All throughout each 5-kilometer cycling time trial, approximately 10 minutes
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Secundaire uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
|---|---|---|
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Cycling Time-Trial Performance
Tijdsspanne: At completion of each 5-kilometer cycling time trial, approximately 30 seconds
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Time in seconds required to complete the 5-kilometer cycling time trial was recorded for the Q-Collar and control conditions.
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At completion of each 5-kilometer cycling time trial, approximately 30 seconds
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Choice Reaction Time
Tijdsspanne: At baseline, 5 minutes into exercise, immediately post-exercise, and 10 minutes post-exercise during each experimental visit, approximately 2 minutes at each time point
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Choice reaction time was assessed using a computerized Stroop task.
Reaction time and response accuracy were evaluated across the Q-Collar and control conditions.
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At baseline, 5 minutes into exercise, immediately post-exercise, and 10 minutes post-exercise during each experimental visit, approximately 2 minutes at each time point
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Heart Rate
Tijdsspanne: During each 5-kilometer cycling time trial, approximately 10 minutes
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Heart rate was continuously assessed using cardiac impedance and compared across the Q-Collar and control conditions.
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During each 5-kilometer cycling time trial, approximately 10 minutes
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Stroke Volume
Tijdsspanne: During each 5-kilometer cycling time trial, approximately 10 minutes
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Stroke volume was continuously assessed using cardiac impedance and compared across the Q-Collar and control conditions.
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During each 5-kilometer cycling time trial, approximately 10 minutes
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Cardiac Output
Tijdsspanne: During each 5-kilometer cycling time trial, approximately 10 minutes
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Cardiac output was continuously assessed using cardiac impedance and compared across the Q-Collar and control conditions.
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During each 5-kilometer cycling time trial, approximately 10 minutes
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Blood Lactate
Tijdsspanne: Immediately following each 5-kilometer cycling time trial, approximately 1 minute
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Blood lactate concentration (mmol/L) was measured from an earlobe capillary blood sample immediately following each cycling time trial.
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Immediately following each 5-kilometer cycling time trial, approximately 1 minute
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Rating of Perceived Exertion
Tijdsspanne: Immediately following each 5-kilometer cycling time trial, approximately 30 seconds
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Rating of perceived exertion was assessed using the Borg 6-20 scale immediately following each 5-kilometer cycling time trial.
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Immediately following each 5-kilometer cycling time trial, approximately 30 seconds
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Medewerkers en onderzoekers
Hier vindt u mensen en organisaties die betrokken zijn bij dit onderzoek.
Sponsor
Studie record data
Deze datums volgen de voortgang van het onderzoeksdossier en de samenvatting van de ingediende resultaten bij ClinicalTrials.gov. Studieverslagen en gerapporteerde resultaten worden beoordeeld door de National Library of Medicine (NLM) om er zeker van te zijn dat ze voldoen aan specifieke kwaliteitscontrolenormen voordat ze op de openbare website worden geplaatst.
Bestudeer belangrijke data
Studie start (Werkelijk)
20 maart 2024
Primaire voltooiing (Werkelijk)
8 mei 2024
Studie voltooiing (Werkelijk)
8 mei 2024
Studieregistratiedata
Eerst ingediend
27 augustus 2026
Eerst ingediend dat voldeed aan de QC-criteria
1 september 2026
Eerst geplaatst (Werkelijk)
9 september 2026
Updates van studierecords
Laatste update geplaatst (Werkelijk)
9 september 2026
Laatste update ingediend die voldeed aan QC-criteria
1 september 2026
Laatst geverifieerd
1 september 2026
Meer informatie
Termen gerelateerd aan deze studie
Trefwoorden
Andere studie-ID-nummers
- IRB-FY24-97
Plan Individuele Deelnemersgegevens (IPD)
Bent u van plan om gegevens van individuele deelnemers (IPD) te delen?
NEE
Beschrijving IPD-plan
There is no current plan for public sharing of individual participant data; however, de-identified data may be considered upon reasonable request.
Informatie over medicijnen en apparaten, studiedocumenten
Bestudeert een door de Amerikaanse FDA gereguleerd geneesmiddel
Nee
Bestudeert een door de Amerikaanse FDA gereguleerd apparaatproduct
Ja
product vervaardigd in en geëxporteerd uit de V.S.
Nee
Deze informatie is zonder wijzigingen rechtstreeks van de website clinicaltrials.gov gehaald. Als u verzoeken heeft om uw onderzoeksgegevens te wijzigen, te verwijderen of bij te werken, neem dan contact op met register@clinicaltrials.gov. Zodra er een wijziging wordt doorgevoerd op clinicaltrials.gov, wordt deze ook automatisch bijgewerkt op onze website .