The Finnish Occupational Health Institute has validated the Oura Ring against the gold standard sleep laboratory test—polysomnography (PSG).

PSG tests are the ultimate proving ground as they capture as much data as possible: brain activity with electroencephalogram (EEG), eye patterns, muscle movement, and two types of heart rate data from electrocardiogram (ECG) and photoplethysmography (PPG).

The aim of this study was to compare the Oura Ring’s ability to detect total sleep, sleep onset, and sleep stage breakdowns to rigorous in-lab PSG.

Findings indicate that Oura not only stacks up but provides sleep data without the discomfort of sleep lab instruments that can impact a subject’s natural sleep.

Read The Study