CIRCADIAN RECOVERY
90-Minute REM Sleep Cycle & Optimal Wake Calculator
Waking up midway through a 90-minute REM cycle triggers sleep inertia and grogginess. Calculate exact bedtime targets.
Target Wake Up Time
OPTIMAL BEDTIMES (INCLUDES 15 MINS TO FALL ASLEEP)
09:45 PM6 Cycles (9h)
11:15 PM5 Cycles (7.5h)
12:45 AM4 Cycles (6h)
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