Evaluation of Changes in Sleep Efficiency Among PIC DU MIDI Staff Between Nights Spent at Home and Nights Spent in the Workplace Under High Altitude Conditions

Recruiting now · Not applicable

Conditions studied: Sleep Disorder (Disorder)

In brief

Sleep organization and cardiorespiratory parameters are disrupted in extreme conditions such as high altitude. The pathophysiology of medical problems related to acute high-altitude exposure is partially understood, but sleep quality indicators are very rarely measured under these conditions. This lack of information is even more pronounced among employees subjected to cyclical exposure to high-altitude hypoxic stress, as is the case for the employees at the Pic du Midi. These 32 employees regularly report to their occupational physician difficulties in managing their sleep disorders, struggling to distinguish symptoms from objective changes in their sleep cycles. Among them, 13 are on call at the summit of the Pic du Midi (2,877 m), while 19 work there during the day and return home to a lower altitude at night to sleep. The investigators also wish to measure structural changes in sleep and its cardiorespiratory parameters using polysomnography in these 13 employees, comparing nights spent at home at normal altitude with those spent at the summit of the Pic du Midi. These changes will also be compared to those of a group of 19 employees who do not sleep at high altitude..

Key facts

Study ID

NCT07423988

Run by

University Hospital, Toulouse

People needed

32

Starts

2026-03-23

Expected to finish

2027-02-28

Last updated by the study team

2026-04-08

Who can join

Age: 18 and older, up to 65. Sex: any. Healthy volunteers: accepted.

You may qualify if…

• 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

You may not qualify if…

• 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 is running

• Unité du sommeil, Hôpital Pierre Paul Riquet, 1 place du Docteur Baylac — Toulouse, Oui, France (enrolling)

Full record on ClinicalTrials.gov

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