Cardio & Fitness
Your ideal sleep hours
Based on 90-minute sleep cycles
Sleep runs in cycles of about 90 minutes — you wake up more rested at the end of a full cycle, not in the middle of one. Tell us what time you want to wake up, to see the best bedtimes.
Go to bed at one of these times, for a complete sleep cycle:
5 cycles (7.5 hours)
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6 cycles (9 hours)
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4 cycles (6 hours)
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This result is a guideline — for persistent sleep issues, talk to a specialist.
National Sleep Foundation recommends 7-9 hours for adults; 90-minute cycles, a widely-accepted concept in sleep research.
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