How Many Hours of Sleep Do You Need?
Sleep need changes by age and by person. Cycle math helps with timing, but total sleep duration still matters.
| Age group | Typical target | Cycle example |
|---|---|---|
| Teens 13-17 | 8-10 hours | 6 cycles = 9 hours |
| Adults 18-64 | 7-9 hours | 5 cycles = 7.5 hours |
| Adults 65+ | 7-8 hours | 5 cycles = 7.5 hours |