Fullpower-AI’s analysis of its 250+ million-night dataset has identified a previously undocumented seasonal pattern in nocturnal breathing rate — and its correlation with nocturnal heart rate. The Sleeptracker-AI platform captures both metrics continuously throughout the night at polysomnography-grade accuracy.

The seasonal pattern for breathing rate is the inverse of the heart rate pattern: breathing rate is higher in summer and lower in winter, while heart rate runs lower in summer and higher in winter. The heart rate seasonal pattern was previously corroborated by an independent study conducted in Japan. The inverse breathing rate correlation, however, appears to be an original finding — one we could not locate in any published literature at the time of this analysis.

That this correlation emerged from a multi-year, population-scale dataset with PSG-grade measurement precision underscores the analytical advantage of long-term passive data collection at this resolution. The finding is a direct product of the depth and duration of the Sleeptracker-AI dataset.