Effects of the Q-Collar During High-Intensity Cycling Exercise
1 de setembro de 2026 atualizado por: 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.
Visão geral do estudo
Status
Concluído
Intervenção / Tratamento
Descrição detalhada
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.
Tipo de estudo
Intervencional
Inscrição (Real)
11
Estágio
- Não aplicável
Contactos e Locais
Esta seção fornece os detalhes de contato para aqueles que conduzem o estudo e informações sobre onde este estudo está sendo realizado.
Locais de estudo
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Iowa
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Cedar Falls, Iowa, Estados Unidos, 50614
- University of Northern Iowa
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Critérios de participação
Os pesquisadores procuram pessoas que se encaixem em uma determinada descrição, chamada de critérios de elegibilidade. Alguns exemplos desses critérios são a condição geral de saúde de uma pessoa ou tratamentos anteriores.
Critérios de elegibilidade
Idades elegíveis para estudo
- Adulto
Aceita Voluntários Saudáveis
Sim
Descrição
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
Plano de estudo
Esta seção fornece detalhes do plano de estudo, incluindo como o estudo é projetado e o que o estudo está medindo.
Como o estudo é projetado?
Detalhes do projeto
- Finalidade Principal: Ciência básica
- Alocação: Randomizado
- Modelo Intervencional: Atribuição cruzada
- Mascaramento: Nenhum (rótulo aberto)
Armas e Intervenções
Grupo de Participantes / Braço |
Intervenção / Tratamento |
|---|---|
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Experimental: 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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Experimental: 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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O que o estudo está medindo?
Medidas de resultados primários
Medida de resultado |
Descrição da medida |
Prazo |
|---|---|---|
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Prefrontal Cortex Oxygenation
Prazo: 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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Medidas de resultados secundários
Medida de resultado |
Descrição da medida |
Prazo |
|---|---|---|
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Cycling Time-Trial Performance
Prazo: 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
Prazo: 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
Prazo: 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
Prazo: 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
Prazo: 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
Prazo: 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
Prazo: 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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Colaboradores e Investigadores
É aqui que você encontrará pessoas e organizações envolvidas com este estudo.
Patrocinador
Datas de registro do estudo
Essas datas acompanham o progresso do registro do estudo e os envios de resumo dos resultados para ClinicalTrials.gov. Os registros do estudo e os resultados relatados são revisados pela National Library of Medicine (NLM) para garantir que atendam aos padrões específicos de controle de qualidade antes de serem publicados no site público.
Datas Principais do Estudo
Início do estudo (Real)
20 de março de 2024
Conclusão Primária (Real)
8 de maio de 2024
Conclusão do estudo (Real)
8 de maio de 2024
Datas de inscrição no estudo
Enviado pela primeira vez
27 de agosto de 2026
Enviado pela primeira vez que atendeu aos critérios de CQ
1 de setembro de 2026
Primeira postagem (Real)
9 de setembro de 2026
Atualizações de registro de estudo
Última Atualização Postada (Real)
9 de setembro de 2026
Última atualização enviada que atendeu aos critérios de controle de qualidade
1 de setembro de 2026
Última verificação
1 de setembro de 2026
Mais Informações
Termos relacionados a este estudo
Palavras-chave
Outros números de identificação do estudo
- IRB-FY24-97
Plano para dados de participantes individuais (IPD)
Planeja compartilhar dados de participantes individuais (IPD)?
NÃO
Descrição do plano IPD
There is no current plan for public sharing of individual participant data; however, de-identified data may be considered upon reasonable request.
Informações sobre medicamentos e dispositivos, documentos de estudo
Estuda um medicamento regulamentado pela FDA dos EUA
Não
Estuda um produto de dispositivo regulamentado pela FDA dos EUA
Sim
produto fabricado e exportado dos EUA
Não
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