Effects of the Q-Collar During High-Intensity Cycling Exercise
1 september 2026 uppdaterad av: 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.
Studieöversikt
Status
Avslutad
Intervention / Behandling
Detaljerad beskrivning
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.
Studietyp
Interventionell
Inskrivning (Faktisk)
11
Fas
- Inte tillämpbar
Kontakter och platser
Det här avsnittet innehåller kontaktuppgifter för dem som genomför studien och information om var denna studie genomförs.
Studieorter
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Iowa
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Cedar Falls, Iowa, Förenta staterna, 50614
- University of Northern Iowa
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Deltagandekriterier
Forskare letar efter personer som passar en viss beskrivning, så kallade behörighetskriterier. Några exempel på dessa kriterier är en persons allmänna hälsotillstånd eller tidigare behandlingar.
Urvalskriterier
Åldrar som är berättigade till studier
- Vuxen
Tar emot friska volontärer
Ja
Beskrivning
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
Studieplan
Det här avsnittet ger detaljer om studieplanen, inklusive hur studien är utformad och vad studien mäter.
Hur är studien utformad?
Designdetaljer
- Primärt syfte: Grundläggande vetenskap
- Tilldelning: Randomiserad
- Interventionsmodell: Crossover tilldelning
- Maskning: Ingen (Open Label)
Vapen och interventioner
Deltagargrupp / Arm |
Intervention / Behandling |
|---|---|
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Experimentell: 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.
|
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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Experimentell: 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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Vad mäter studien?
Primära resultatmått
Resultatmått |
Åtgärdsbeskrivning |
Tidsram |
|---|---|---|
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Prefrontal Cortex Oxygenation
Tidsram: 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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Sekundära resultatmått
Resultatmått |
Åtgärdsbeskrivning |
Tidsram |
|---|---|---|
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Cycling Time-Trial Performance
Tidsram: 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
Tidsram: 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
Tidsram: 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
Tidsram: 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
Tidsram: 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
Tidsram: 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
Tidsram: 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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Samarbetspartners och utredare
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Sponsor
Studieavstämningsdatum
Dessa datum spårar framstegen för inlämningar av studieposter och sammanfattande resultat till ClinicalTrials.gov. Studieposter och rapporterade resultat granskas av National Library of Medicine (NLM) för att säkerställa att de uppfyller specifika kvalitetskontrollstandarder innan de publiceras på den offentliga webbplatsen.
Studera stora datum
Studiestart (Faktisk)
20 mars 2024
Primärt slutförande (Faktisk)
8 maj 2024
Avslutad studie (Faktisk)
8 maj 2024
Studieregistreringsdatum
Först inskickad
27 augusti 2026
Först inskickad som uppfyllde QC-kriterierna
1 september 2026
Första postat (Faktisk)
9 september 2026
Uppdateringar av studier
Senaste uppdatering publicerad (Faktisk)
9 september 2026
Senaste inskickade uppdateringen som uppfyllde QC-kriterierna
1 september 2026
Senast verifierad
1 september 2026
Mer information
Termer relaterade till denna studie
Nyckelord
Andra studie-ID-nummer
- IRB-FY24-97
Plan för individuella deltagardata (IPD)
Planerar du att dela individuella deltagardata (IPD)?
NEJ
IPD-planbeskrivning
There is no current plan for public sharing of individual participant data; however, de-identified data may be considered upon reasonable request.
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Nej
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