Sleep architecture basics: REM, deep sleep, and what to optimize first

Most people track sleep duration but ignore sleep architecture. Time in bed is not the same as restorative sleep. This guide breaks down REM, deep sleep, sleep continuity, and the daily behaviors that improve architecture without overcomplicating your routine.[5]

Sleep architecture quality matters beyond total hours slept.

Schedule and stimulant timing are major architecture levers.

Use wearable trends as directional feedback, not diagnosis.