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Polysomnography

The overnight, in-lab sleep study that records brain waves, breathing, oxygen, heart rate, and movement to diagnose sleep disorders such as obstructive sleep apnea.

By the glp1.how editorial teamReviewed

Polysomnography is the full overnight sleep study done in a sleep lab. Sensors record brain waves, eye movement, muscle activity, breathing effort and airflow, blood oxygen, and heart rhythm while you sleep, so a specialist can see exactly what happens through each sleep stage. It's the gold-standard test for obstructive sleep apnea and for other sleep disorders; a simpler home sleep apnea test is often used first when apnea is the main question.

For someone on a GLP-1 it matters in two directions: untreated apnea works against weight loss and recovery, and one GLP-1 medication is now approved to treat apnea itself — so a study can both open a treatment pathway and, later, confirm whether apnea has resolved as weight comes off. See the guide on getting a sleep study. Source: MedlinePlus (external link).

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Updated 1 time since Sep 2, 2026 · show changes
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Related terms

  • Obstructive sleep apnea · A sleep disorder in which the airway repeatedly collapses during sleep, causing brief pauses in breathing; it is closely linked to obesity.
  • GLP-1 · A gut hormone (glucagon-like peptide-1) that stimulates insulin release, slows digestion, and reduces appetite; the target of drugs like semaglutide and liraglutide.

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