Adaptability

For schedules to be adaptable,

• they must provide enough TST to accommodate REM, SWS, and the light-sleep buffer.
• they must not have excessively large gaps.
• they must allow for some amount of sleep debt recovery so that Stage-4 can happen.
• they must have the sleeps at appropriate times for peaks
• they must fit the sleeper (e.g. some people cannot get vitals in naps)