How Long Is A Sleep Cycle?
The 90-minute model is practical, but cycle length is not identical every night.
Key Takeaways
- Cycle length changes with stress, sleep debt, and timing.
- Later cycles are not identical to early cycles.
- A range works better than exact-minute rigidity.
Action Steps
- +Start with 90-minute planning.
- +Adjust bedtime by 10-20 minutes based on outcomes.
- +Keep wake time stable while testing.
- +Avoid major weekend schedule jumps.
Apply This To Your Schedule
Use the calculator to turn these principles into exact bedtime and wake-up options.
Plan Wake-Up Times