Does my sleep change as I get older, and is that normal?
Your sleep genuinely changes with age: feeling tired earlier, sleeping more lightly and for shorter periods, and waking more often are ordinary signs of ageing. But severe daytime fatigue, pauses in breathing, or moving during sleep are not normal ageing and warrant a visit to a doctor.
Yes, your sleep changes with age, and most of those changes are normal. Your rhythm shifts forward: you feel tired earlier in the evening and wake up earlier in the morning. That is not a sleep disorder, but a perfectly ordinary biological adjustment. Your night's sleep also becomes shorter and more frequently interrupted. Many of these changes begin as early as your twenties and thirties and stabilise after that.
The biggest shift is less deep sleep. Deep sleep is the most restorative phase, and it declines noticeably as you age. Two biological systems weaken at the same time: your internal clock and the mechanism that builds up sleep pressure during the day. As a result, your sleep becomes lighter and less continuous. It is no surprise that many older people nap more often.
This reduction in deep sleep can have consequences for memory and cognitive performance. Several studies find a link between poorer sleep in later life and cognitive decline, although this varies from person to person1,2,3. Whether poor sleep is a cause or a consequence is not yet entirely clear. Research does suggest, however, that people who sleep well in younger and middle age function better cognitively in later life.
Alongside normal ageing, genuine sleep disorders also become more common in older adults: insomnia, sleep apnoea (in which breathing repeatedly stops), restless legs, and a disorder in which people physically act out their dreams. These are emphatically not normal. Waking up early or sleeping more lightly is part of ageing, but severe daytime sleepiness, loud snoring with pauses in breathing, or actively moving during sleep are signals to consult a doctor4,5.
A large cohort study shows that a stable, normal sleep duration offers the best chance of healthy ageing, with fewer chronic illnesses and better cognitive and physical functioning. People with consistently too little sleep, or sleep that grew progressively longer over the years, fared significantly worse6,7,8. In short: do not automatically dismiss sleep complaints as something that simply comes with age, and seek professional help when real problems arise.
Based on multiple large-scale sleep studies and reviews (PMIDs: 29412976, 28384471, 25620997, 33311760, 33791849, 35886309, 36396275, 39482676). Most findings on normal sleep changes come from consistent, replicated studies. The evidence for cognitive consequences is largely based on associations and is not always unambiguous.