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Effects of the Q-Collar During High-Intensity Cycling Exercise

1. september 2026 opdateret af: 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.

Studieoversigt

Status

Afsluttet

Betingelser

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

Interventionel

Tilmelding (Faktiske)

11

Fase

  • Ikke anvendelig

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiesteder

    • Iowa
      • Cedar Falls, Iowa, Forenede Stater, 50614
        • University of Northern Iowa

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

  • Voksen

Tager imod sunde frivillige

Ja

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

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Grundvidenskab
  • Tildeling: Randomiseret
  • Interventionel model: Crossover opgave
  • Maskning: Ingen (Åben etiket)

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
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.
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.
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.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Prefrontal Cortex Oxygenation
Tidsramme: All throughout each 5-kilometer cycling time trial, approximately 10 minutes
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.
All throughout each 5-kilometer cycling time trial, approximately 10 minutes

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Cycling Time-Trial Performance
Tidsramme: At completion of each 5-kilometer cycling time trial, approximately 30 seconds
Time in seconds required to complete the 5-kilometer cycling time trial was recorded for the Q-Collar and control conditions.
At completion of each 5-kilometer cycling time trial, approximately 30 seconds
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
Choice reaction time was assessed using a computerized Stroop task. Reaction time and response accuracy were evaluated across the Q-Collar and control conditions.
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
Heart Rate
Tidsramme: During each 5-kilometer cycling time trial, approximately 10 minutes
Heart rate was continuously assessed using cardiac impedance and compared across the Q-Collar and control conditions.
During each 5-kilometer cycling time trial, approximately 10 minutes
Stroke Volume
Tidsramme: During each 5-kilometer cycling time trial, approximately 10 minutes
Stroke volume was continuously assessed using cardiac impedance and compared across the Q-Collar and control conditions.
During each 5-kilometer cycling time trial, approximately 10 minutes
Cardiac Output
Tidsramme: During each 5-kilometer cycling time trial, approximately 10 minutes
Cardiac output was continuously assessed using cardiac impedance and compared across the Q-Collar and control conditions.
During each 5-kilometer cycling time trial, approximately 10 minutes
Blood Lactate
Tidsramme: Immediately following each 5-kilometer cycling time trial, approximately 1 minute
Blood lactate concentration (mmol/L) was measured from an earlobe capillary blood sample immediately following each cycling time trial.
Immediately following each 5-kilometer cycling time trial, approximately 1 minute
Rating of Perceived Exertion
Tidsramme: Immediately following each 5-kilometer cycling time trial, approximately 30 seconds
Rating of perceived exertion was assessed using the Borg 6-20 scale immediately following each 5-kilometer cycling time trial.
Immediately following each 5-kilometer cycling time trial, approximately 30 seconds

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Faktiske)

20. marts 2024

Primær færdiggørelse (Faktiske)

8. maj 2024

Studieafslutning (Faktiske)

8. maj 2024

Datoer for studieregistrering

Først indsendt

27. august 2026

Først indsendt, der opfyldte QC-kriterier

1. september 2026

Først opslået (Faktiske)

9. september 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

9. september 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

1. september 2026

Sidst verificeret

1. september 2026

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • IRB-FY24-97

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

INGEN

IPD-planbeskrivelse

There is no current plan for public sharing of individual participant data; however, de-identified data may be considered upon reasonable request.

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

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Ingen

Studerer et amerikansk FDA-reguleret enhedsprodukt

Ja

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Ingen

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