Loading search results

Outcome Measures

Primary Outcomes (1)

Prefrontal Cortex Oxygenation
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

Secondary Outcomes (7)

Cycling Time-Trial Performance
At completion of each 5-kilometer cycling time trial, approximately 30 seconds
Choice Reaction Time
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
During each 5-kilometer cycling time trial, approximately 10 minutes
Stroke Volume
During each 5-kilometer cycling time trial, approximately 10 minutes
Cardiac Output
During each 5-kilometer cycling time trial, approximately 10 minutes
+2 more secondary outcomes

Study Arms (2)

Q-Collar Then Control

EXPERIMENTAL

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.

Device: Q-Collar™

Control Then Q-Collar

EXPERIMENTAL

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.

Device: Q-Collar™

Interventions

Q-Collar™Device

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.

Control Then Q-CollarQ-Collar Then Control

Registry-reported names are shown in full. Names without a link have not yet been matched to a Syfrah profile.

Study Design

Study Type

interventional

Phase

not applicable

Allocation

RANDOMIZED

Masking

NONE

Purpose

BASIC SCIENCE

Intervention Model

CROSSOVER

Model Details: Participants completed two 5-kilometer cycling time trials in randomized, counterbalanced order: one while wearing the Q-Collar and one without the Q-Collar. Each participant served as his own control, with at least 72 hours between conditions.

Sponsor Type

OTHER

Responsible Party

SPONSOR

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

Brief Summary

Registry Overview

Trial Relationships

Study Timeline

Study Start

Primary Completion

Study Completion

First Submitted

First Posted

Conditions

Keywords

Outcome Measures

Primary Outcomes (1)

Secondary Outcomes (7)

Study Arms (2)

Q-Collar Then Control

Control Then Q-Collar

Interventions

Eligibility Criteria

You may qualify if:

Sponsors & Collaborators

Study Sites (1)

Enrollment

Study Design

Study Record Dates

You may not qualify if:

Data Sharing

Source record

Locations

Brief Summary

Registry Overview

Trial Relationships

Related Scientific Literature

Study Timeline

Study Start

Primary Completion

Study Completion

First Submitted

First Posted

Conditions

Keywords

Outcome Measures

Primary Outcomes (1)

Secondary Outcomes (7)

Study Arms (2)

Q-Collar Then Control

Control Then Q-Collar

Interventions

Eligibility Criteria

You may qualify if:

Sponsors & Collaborators

Study Sites (1)

Enrollment

Study Design

Study Record Dates

You may not qualify if:

Data Sharing

Source record

Locations