Sleep Cycles
Pick a wake time or bedtime. See the four slots that align with 90-minute cycles — the sweet spot for feeling rested.
10:45 PM
Bedtime for 5 cycles (7.5 hrs)
Bedtime options
Recommended: 7–9 hrs at your age.
Freedom Coach™
Bedtimes to feel rested when you wake up at 6:30 AM.
Adults 35 need 7–9 hours. Waking mid-cycle causes grogginess — the 4–5 cycle slots below tend to feel best.
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Track bedtime vs energy — Fighters see which slot leaves them most rested.
Unlock PremiumSleep progresses through NREM → REM in roughly 90-minute cycles. Waking mid-cycle (especially deep NREM) causes grogginess. Multiples of 90 minutes align better with a natural cycle end.
Most adults feel best with 5 cycles (7.5 hours). 4 cycles (6 hours) is doable short-term; 6 cycles (9 hours) suits recovery weeks or teenagers.
One brief wake-up is normal. If it stretches over 20 minutes, get up, read something dull under dim light, and return once drowsy — don't stay in bed frustrated.
Yes — most adults take 10–20 min to fall asleep. Adding that buffer keeps target times honest.
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