Adults Generally Need 7–9 Hours

MedlinePlus guidance says adults age 18 and older generally need 7–9 hours of sleep a day.

The Range Isn’t One-Size-Fits-All

The range is general, not one-size-fits-all. Health, lifestyle, patterns, and restful or interrupted sleep also matter.

Sleep Needs Don’t Disappear With Age

MedlinePlus says there is no evidence adults need less sleep with age. Older adults may sleep less deeply and wake more easily.

Sleep Has Different Stages

Sleep cycles through non-REM and REM stages, from light to deep non-REM sleep. Frequent interruptions may limit time in some stages.

Sleep Supports Body And Mind

Sleep supports learning, memory, tissue repair, immune function, and hormones involved in hunger and fullness. Too little can hinder thinking and reactions.

Keep A Consistent Schedule

Keep bedtime and wake time consistent daily. Before bed, try reading, a bath, or calm music to wind down.

Shift Work Can Complicate Sleep

Shift work can complicate sleep. MedlinePlus suggests naps, more total sleep, bright work lighting, and limiting caffeine to early in a shift.