Sleep efficiency and breathing during nights at high altitude versus nights at home for Pic du Midi staff.
Official title: Evaluation of Changes in Sleep Efficiency Among PIC DU MIDI Employees Between Nights Spent at Home (Without Increased Altitude) and Nights Spent in a Professional Environment Under High Altitude Conditions
Run by University Hospital, Toulouse · NCT07423988 · Data updated 2026-11-12
We test whether nights spent at 2,877 m change sleep efficiency and breathing patterns for Pic du Midi staff compared with nights spent at home.
Quick facts
| Study type | Interventional |
|---|---|
| Ages | 18 Years to 65 Years |
| Sex | All |
| Enrollment | 32 (estimated) |
| Sponsor | University Hospital, Toulouse Academic / other |
| Locations | 1 site (Toulouse, Oui) |
| Status | Recruiting |
| Started | March 23, 2026 |
| Main results expected | February 1, 2027 |
| Study ends | February 28, 2027 |
| Registry record updated | April 8, 2026 |
| Trial ID | NCT07423988 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Ideal candidates are Pic du Midi employees who have worked there at least one month and either sleep on-call at the 2,877 m summit or return home at night, who are covered by social security and can give informed written consent.
✕Probably not a fit
Individuals with a history of cardiovascular disease, those taking cardiovascular or psychotropic medications, or persons under legal guardianship are excluded and would not be eligible to benefit from participation.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This project records overnight sleep and cardiorespiratory signals in 32 employees of the Pic du Midi, of whom 13 sleep on-call at the 2,877 m summit and 19 sleep at lower altitude at home. Participants will undergo polysomnography and related sleep recordings to compare sleep organization and breathing parameters between nights at high altitude and nights at home. The protocol excludes people with cardiovascular disease, those taking cardiovascular or psychotropic medications, and those under legal guardianship. Recordings and analyses are performed through the University Hospital Toulouse sleep unit working with occupational health services for Pic du Midi staff.
Why it matters
Potential benefit: If successful, the results could help occupational physicians distinguish altitude-related changes from perceived sleep problems and guide sleep and work recommendations for high-altitude workers.
How similar studies have gone: Previous studies show acute high-altitude exposure commonly disrupts sleep and causes periodic breathing, but targeted polysomnography in workers with cyclical occupational exposure like Pic du Midi staff is uncommon.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: Group "with on-call night at high altitude at the Pic du Midi": * Employed at the Pic du Midi for at least one month * Working nights at high altitude (at the Pic du Midi, altitude of 2877m) as part of their professional activity * Person affiliated with or covered by a social security scheme * Free, informed, and written consent signed by the participant and the investigator Night group "without on-call night at high altitude": * Employed at the Pic du Midi for at least one month * Not working nights at high altitude (at the Pic du Midi, altitude of 2877m) as part of their professional activity * Person affiliated with or covered by a social security scheme social * Free, informed and written consent signed by the participant and the investigator Exclusion Criteria: * For all participants: * History of cardiovascular disease * Use of cardiovascular/psychotropic medication * Participant under legal guardianship or other protective regime (guardianship, curatorship) * Pregnant or breastfeeding woman * French language proficiency insufficient to complete the questionnaires
Where it's running
-
Unité du sommeil, Hôpital Pierre Paul Riquet, 1 place du Docteur Baylac
Toulouse, Oui, France Recruiting
Study contacts
- Study coordinator: Rachel DEBS, MD
- Email: debs.r@chu-toulouse.fr
- Phone: 05 61 77 94 88
Similar studies
Other studies for the same condition or treatment. Recruiting studies are listed first.
-
Sleep, Stress and Migraine — Personalized Sleep and Stress Training
This project tries to see if using a WHOOP wearable and daily app questions to track sleep and stress can identify personal triggers and deliver tailored sleep and stress recommendations to reduce migraine attacks in adults with episodic migraine.
-
Telerehabilitation dual-task exercises for balance, thinking, and sleep in older adults
This program will test whether dual-task exercises delivered by video calls can improve balance, reduce fall risk, and help thinking and sleep in people aged 65 to 74.
-
Start CPAP After AF Ablation in OSA Patients
This study tests whether adding CPAP after AF ablation helps prevent atrial arrhythmia recurrence in adults with obstructive sleep apnea.
-
Link between sleep problems found with a brief questionnaire and heart disease
This project tests whether a short questionnaire used during cardiology visits can quickly find sleep problems related to cardiovascular disease in adult cardiology patients.
-
Sleep and stress relief with lavender, PEA, or OEA supplements
This trial will test whether a daily capsule of lavender oil, PEA, or OEA helps adults with moderate stress who have sleep problems sleep better and feel less stressed.
-
Turkish version of a sleep screening tool for children with complex chronic conditions
This project will test whether a Turkish sleep questionnaire combined with actigraphy can accurately find sleep problems in children and adolescents with complex chronic conditions during and after a PICU stay.
How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.