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Mountain air vs. machine: which altitude experience is more intense?

NCT ID NCT04075565

Knowledge-focused Sponsor: University of Applied Sciences and Arts of Southern Switzerland Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study looked at how being at a real high altitude (3,000 meters in a mountain hut) compares to a machine that mimics low-oxygen conditions. Twenty healthy adults took part, and researchers measured things like brain oxygen, blood oxygen, heart rate, sleep quality, and altitude sickness. The goal was to understand the differences between real and simulated high altitude on the body and mind.

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

20 people

The number who actually took part.

Started

Jun 2019

Finished

Apr 2022

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

18 to 50 years

Sex

Anyone

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: * Healthy, adults aged 18 to 50 years * No cardiovascular disease and / or surgery * no surgery on the cardiovascular system. * No current injuries and / or pain * Regular and adequate sleep * No terrestrial altitude of 1000 m exceeded last month (including flights) * No form of hypoxia exposed last month Exclusion Criteria: * Age over 50 years * current injuries of any kind and / or pain * Acute and / or chronic pain conditions Known general diseases (e.g., diabetes mellitus) * fear of hypoxia * fear of heights or sensitivity to terrestrial altitude * Regular use of medicines (also bought by yourself), except for contraceptives * Cardiovascular diseases or abnormalities * Anomalies of the blood analysis or ECG * Psychological disorders * pregnancy / lactation

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Conditions

The condition(s) this trial relates to.

acute mountain sickness altitude sickness Hypoxia

As listed by the trial registrant

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

Altitude Altitude hypoxia Altitude sickness Hypoxia Hypoxia, altitude Mountain sickness

Contacts and locations

Locations

  • Fachhochschule Südschweiz

    Landquart, Kanton Graubünden, 7302, Switzerland

  • Fachhochschule Südschweiz

    Landquart, 7302, Switzerland

  • University of Applied Sciences and Arts of Southern Switzerland (SUPSI)

    Landquart, Kanton Graubünden, 7302, Switzerland

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