These days I often sleep after midnight and get up early. I barely manage seven hours, and that seems to be the pattern for a lot of people my age. There is always one more thing to finish, one more message, one more reason to stay awake. I am still young and my body is probably at its most optimal condition, that is why I can still remain as vigilant as I am. The same is not always true for seniors.
As people grow older, sleep often becomes lighter, more fragmented and harder to maintain. That does not mean the elderly need more sleep than everyone else. The National Institute on Aging recommends around 7–9 hours of sleep for older adults, which is just about the same range given to other adults. The important part about sleep has always been getting enough of it consistently.
How much sleep do seniors need?
The general belief is that the elderly require more sleep, or will sleep more, and it is true that sleep changes with age. Older adults often spend less time in deeper stages of sleep and tend to wake more frequently during the night. Medical conditions, medications, pain, changes in routine and sleep disorders can also interfere. But needing less sleep is not the same as functioning well on very little of it.
The general recommendation remains around 7–9 hours per night for older adults. One occasional night of six and a half hours is not a crisis, and again, the real concern is when inadequate sleep becomes a regular thing.
A 2024 study of more than 7,000 adults aged 50 and above in India found that 36.1% reported sleeping less than seven hours, while 12.84% reported more than eight hours. Short sleep was more common among those with chronic conditions and body pain.
So our discussion is not about getting seniors to sleep more, but rather getting them enough sleep regularly and understanding what this does for the ageing mind. To achieve this we must first understand why good sleep becomes harder and what can be done about it.
What sleep actually does for the brain
It is a well-known fact that our brain never actually shuts off during sleep. Sleep supports processes important for memory, attention, learning and overall brain function. Research into sleep and memory has repeatedly shown that sleep plays a role in consolidating information; helping the brain process and retain what was experienced during the day. This becomes important with someone who is already having a hard time remembering things.
A systematic review of observational studies found that sleep duration was associated with cognitive function in older adults, though findings were not completely consistent. Both unusually short and unusually long sleep were sometimes linked with poorer cognition, as even longer off times mean a less active brain. This, therefore, makes the line between too much and too little rather blurry.
The relationship between sleep and the ageing brain is complicated
It is easy to see research linking poor sleep with cognitive decline and conclude that lack of sleep causes dementia. The evidence does not support such a simple statement.
A 2024 meta-analysis involving more than 10 million participants found a non-linear relationship between sleep duration and cognitive decline. Both short and long sleep were associated with increased risk compared with moderate sleep duration. Another recent umbrella review of systematic reviews found a similar U-shaped pattern, but described the overall certainty of the evidence as low and called for better research.
Instead let us look at another possibility: sometimes changes in sleep are a symptom of an underlying health problem rather than its cause. If an older adult who normally sleeps seven hours suddenly begins sleeping ten or eleven hours every day, that will obviously raise concerns. Something else may be going on.
Effects of poor sleep on the ageing brain
The effects of poor sleep, rather than going straight to dementia, will often show up in ordinary daily life.
Someone may feel less alert in the morning. Concentration becomes harder. Reaction time slows. Mood is affected. Small things are forgotten more often. When poor sleep continues, daytime tiredness makes it harder to stay physically and socially active.
This can create a cycle: poor sleep reduces energy, which leads to less activity and lower mood, which in turn causes a disrupted routine and eventually even harder sleep. That is where sleep buys a seat at the Healthy Ageing table.
Why do older adults struggle with sleep?
Age-related changes in the body’s sleep-wake rhythm can cause older adults to become sleepy earlier in the evening and wake earlier in the morning. Pain from arthritis or other conditions will interrupt the night. Frequent urination breaks sleep. Some medications interfere. Anxiety, depression and stress make falling or staying asleep difficult. Sleep disorders such as insomnia and sleep apnea often go undiagnosed.
The National Institute on Aging specifically notes insomnia, sleep apnea and other sleep disorders among common problems that interfere with sleep in older adults. Simply telling someone to “go to bed earlier” is rarely enough. Another important part of sleep, strangely enough, is the things that happen before the sleep.
Sleep hygiene for older adults
When we say sleep hygiene, we are not talking about taking a shower before bed, though that does help. Sleep hygiene refers to a series of healthy daily habits, behaviours and environmental factors that you can use to improve the quality and quantity of your sleep. There are plenty of techniques not only meant for seniors but even for you. For seniors, here are some tips that are proven to show promising results.
Keep a consistent sleep schedule. Going to bed and waking up at roughly the same times each day helps reinforce the body’s natural rhythm. It is like training your body.
Get daylight and activity during the day. Regular daytime movement supports better sleep at night. We all know exercise is useful for many reasons and sleep just happens to be one of them. It is generally better to exercise earlier in the day rather than vigorously just before bed.
Watch late-afternoon naps. I know how tempting an afternoon nap can be, especially under that subtle sunset sunlight. A short nap can be fine, but a long nap at 6 p.m. often makes it harder to sleep at night. The National Institute on Aging recommends avoiding late-afternoon or evening naps when they interfere with nighttime sleep.
Keep the bedroom comfortable. This looks like it could drain your wallet, but not really. All that is needed is a quiet, dark and well-ventilated room. Older adults can be particularly sensitive to discomfort at night.
Be careful with caffeine and large meals late in the day. Tea and coffee are normal parts of many Indian households, but timing matters. Avoiding caffeine, alcohol and large meals close to bedtime is sensible advice.
What about screens before bed? You would not expect to be talking about screen time when referring to grown people, but this is not only a teenage problem. Phones and televisions can keep anyone awake when they become part of the bedtime routine. The light is one factor; an interesting video, an upsetting message or one more WhatsApp conversation can also keep the brain engaged when it should be winding down. Making the final part of the evening quieter with things like reading, calm music, talking with family, gentle yoga, often helps.
Don’t ignore persistent sleep problems
If a senior regularly struggles to fall asleep, wakes repeatedly, feels excessively sleepy during the day, snores heavily, gasps during sleep, or experiences a major change in sleeping pattern, it is worth discussing with a healthcare professional. This is especially important when poor sleep is accompanied by changes in memory, mood, mobility or everyday functioning.
In some cases, people have resorted to using sleeping pills or sedatives. It may be treating pain, or managing another medical condition, but if it is not prescribed then it could simply be masking the underlying condition. Persistent sleep problems require more attention than accepting them as “part of getting old.”
Is seven hours the magic number?
The title says 7+ hours because seven hours is a useful lower boundary within the general recommendation for older adults; not because the brain suddenly stops functioning at 6 hours and 59 minutes. Some seniors feel fine on seven hours. Others need eight or nine. What matters is the overall pattern: sufficient duration, reasonable quality, regularity, and how the person functions during the day.
More is not always better. Research increasingly suggests that both unusually short and unusually long sleep can be associated with poorer cognitive outcomes in older adults. Someone routinely sleeping ten or eleven hours and still waking exhausted is not necessarily thriving. It may be something that needs looking into.
Practical sleep tips for elderly family members
If you are helping an older parent or relative, start with manageable changes:
Keep bedtime and wake-up times fairly consistent
Encourage regular daytime movement appropriate to their abilities
Get some natural daylight during the day
Keep naps short and avoid them late in the day if they disrupt nighttime sleep
Reduce caffeine later in the day
Avoid heavy meals close to bedtime
Make the bedroom quiet, dark and comfortable
Reduce phone and television use close to bedtime
Encourage relaxing activities in the evening
Pay attention to persistent snoring, breathing problems or excessive daytime sleepiness
Speak to a healthcare professional when sleep problems persist or suddenly change
None of these will guarantee perfect sleep, but it is the little we can do to help them sleep better.
A good night is part of a healthy day
We tend to think about healthy ageing through the things we can see; walking, eating, blood pressure, exercise. Sleep is less visible, but it has certainly earned a spot in this conversation.
For older adults, around 7–9 hours of sleep will do. Research continues to show that both insufficient and excessive sleep may be associated with poorer cognitive outcomes. We cannot stay up counting every minute or worrying about one bad night. But sleep needs to stop being viewed as wasted time, or as a rewind switch.
Perhaps that is something the rest of us could learn as well. We have become very good at squeezing more into our waking hours. Sometimes the best way forward is to take a step back. Put the phone away. Finish tomorrow’s work tomorrow. Let yourself be human for once.
Sleep is not time lost from life. For an ageing brain, it is part of how the body keeps life running well.
References
- National Institute on Aging. (n.d.). Sleep and older adults. NIA
- National Institute on Aging. (n.d.). 6 healthy sleep habits for older adults. NIA
- Muhammad, T., Pai, M., Ahire, K., & Sharma, M. (2024). Demographic, socioeconomic, and health correlates of sleep quality and sleep duration among community-dwelling older adults in India. BMC Psychiatry, 24, 665. DOI · PubMed record
- Devore, E. E., Grodstein, F., & Schernhammer, E. S. (2016). Sleep duration in relation to cognitive function among older adults: A systematic review of observational studies. Neuroepidemiology, 46(1), 57–78. PubMed record
- Lo, J. C., Groeger, J. A., Cheng, G. H., Dijk, D. J., & Chee, M. W. L. (2016). Self-reported sleep duration and cognitive performance in older adults: A systematic review and meta-analysis. Sleep Medicine, 17, 87–98. PubMed record
- Tian, C., et al. (2024). Prolonged sleep duration as a predictor of cognitive decline: A meta-analysis encompassing 49 cohort studies. Neuroscience & Biobehavioral Reviews, 164, 105817. PubMed record
