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Can a spin on a bike reveal how blood flows? scientists put pulse sensors to the test

NCT ID NCT07830615

NEW Knowledge-focused Sponsor: ARCIM Institute Academic Research in Complementary and Integrative Medicine Source: ClinicalTrials.gov ↗

What the study statuses mean

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Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Sep 21, 2026 · Last updated Sep 21, 2026

Summary

Researchers want to know how a single session of graded cycling exercise affects blood flow through small vessels and heart signals in healthy adult men. Twelve non-smoking men with normal heart readings cycle on a stationary bike for 28 minutes at increasing intensities, then rest for 16 minutes. The team continuously records the perfusion index and other cardiovascular measures, and compares readings from two pulse oximeter systems placed on the forehead and finger.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
A single session of standardized cycling exercise on a bicycle ergometer
What this could lead to
If the measurements prove reliable, this could help researchers design better ways to track blood flow and heart function during exercise in future studies.
What could go wrong
This is a small pilot study of 12 healthy men, so any patterns may not hold in women, older adults, or people with heart conditions. It tests measurement methods, not a treatment.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

12 people

The number who actually took part.

Started

May 2007

Finished

Jun 2007

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

20 to 40 years

Sex

Male participants only

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Written informed consent for participation in the study * Non-smoker * Normal resting electrocardiogram and resting blood pressure not exceeding 140/90 mmHg * No family history of myocardial infarction or sudden cardiac death in a first-degree relative younger than 60 years at the time of the event Exclusion Criteria: * Acute or chronic diseases, particularly cardiovascular conditions * Use of conventional medications or recreational drugs * Disorders of autonomic regulation

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As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Effects of standardized physical exercise on A bicycle ergometer on the perfusion index (PI) and other cardiovascular parameters

Contacts and locations

Locations

  • ARCIM Institute

    Filderstadt, Baden-Wurttemberg, 70794, Germany