Effects of the Q-Collar During High-Intensity Cycling Exercise
Cardiovascular, Cerebral, and Performance Responses to Q-Collar™ Use in a 5-km Cycling Time Trial
Studieoversigt
Status
Status
Betingelser
Betingelser
Intervention / Behandling
Intervention / Behandling
Detaljeret beskrivelse
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.
Undersøgelsestype
Undersøgelsestype
Tilmelding (Faktiske)
Tilmelding
Fase
Fase
- Ikke anvendelig
Kontakter og lokationer
Studiesteder
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Iowa
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Cedar Falls, Iowa, Forenede Stater, 50614
- University of Northern Iowa
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Deltagelseskriterier
Berettigelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
- Voksen
Tager imod sunde frivillige
Beskrivelse
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
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Grundvidenskab
- Tildeling: Randomiseret
- Interventionel model: Crossover opgave
- Maskning: Ingen (Åben etiket)
Antal våben
Våben og indgreb
Deltagergruppe / ArmDeltagergruppe / Arm |
Intervention / BehandlingIntervention / Behandling |
|---|---|
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Eksperimentel: 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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Eksperimentel: 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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Hvad måler undersøgelsen?
Primære resultatmål
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
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Prefrontal Cortex Oxygenation
Tidsramme: 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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Sekundære resultatmål
Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
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Cycling Time-Trial Performance
Tidsramme: 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
Tidsramme: 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
Tidsramme: 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
Tidsramme: 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
Tidsramme: 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
Tidsramme: 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
Tidsramme: 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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Samarbejdspartnere og efterforskere
Sponsor
Sponsor
Datoer for undersøgelser
Studer store datoer
Studiestart (Faktiske)
Studiestart
Primær færdiggørelse (Faktiske)
Primær færdiggørelse
Studieafslutning (Faktiske)
Studieafslutning
Datoer for studieregistrering
Først indsendt
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først indsendt, der opfyldte QC-kriterier
Først opslået (Faktiske)
Først opslået
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Faktiske)
Sidste opdatering sendt
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Nøgleord
Andre undersøgelses-id-numre
Andre undersøgelses-id-numre
- IRB-FY24-97
Plan for individuelle deltagerdata (IPD)
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IPD-planbeskrivelse
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