Group items tagged

During REM sleep, the respiratory pattern is irregular, with differences in the size of breaths and the spacing between them. Breathing during deep sleep follows an ordered pattern, "like a sine wave," says Bianchi. "And the breath-to-breath differences are very small." The lighter stages of non-REM sleep fall somewhere in between. "The motivation behind the shirt is to allow repeated measurements over time in the home," he adds. Users can log their habits, such as coffee or alcohol intake, exercise, or stress, and look for patterns in how those variables affect their quality of sleep.