How and why sleep changes with age
Sleep in a 75-year-old is biologically different from sleep in a 40-year-old. People tend to fall asleep earlier, wake up sooner in the morning, experience more night-time awakenings, and spend less time in deep sleep. These changes are normal and do not in themselves signal illness. What does change is the body's ability to recover from a bad night: where one extra hour used to be enough, the cumulative effect now takes a much heavier toll.
Melatonin, the hormone that regulates the sleep-wake cycle, is produced in smaller amounts as we age, making sleep lighter and more fragmented. In addition, the circadian clock shifts forward: the older person feels sleepy by eight or nine in the evening and wakes at four or five in the morning. This is physiological, but it can cause concern in families if it is not understood as a normal change.
It is important to distinguish between these natural sleep changes and genuine insomnia. If the person sleeps fewer hours but feels rested during the day, there is probably no clinical problem. The issue arises when sleep stops being restorative and the consequences show in mood, memory, or accident risk.
The most common causes of insomnia in older adults
Insomnia rarely has a single cause. In older adults it is usually the combination of several factors that reinforce each other: the pain that makes it hard to find a comfortable position, the medication that disrupts sleep cycles, the anxiety that flares in the silence of night, and the lack of daytime activity that confuses the body clock. Working out which factors are at play in each case is the first step towards action.
Loneliness and lack of daily structure deserve special mention. When an older person spends the day without meaningful activities or conversations, the body loses the external cues that signal when to be active and when to rest. The result is a monotonous day where night-time sleep becomes unpredictable and unsatisfying.
What happens when insomnia becomes chronic
One bad night is unpleasant but not dangerous. Insomnia that stretches on for weeks or months is a different matter entirely. The body and mind pay a real price — and in older adults, that price can be especially steep. According to the Spanish Neurological Society, chronic insomnia in people over 65 doubles the risk of falls and triples the likelihood of emergency department visits for household accidents.
The risk of falls increases significantly because reflexes and balance deteriorate with sleep deprivation. Memory and concentration are also affected, which can be mistaken for early cognitive decline or dementia. Mood takes a hit too: irritability, sadness, and apathy are frequent companions of chronic insomnia, creating a vicious circle that is hard to break.
The immune system weakens as well. Older adults with chronic insomnia are more susceptible to infections, take longer to recover from illness, and respond less effectively to vaccines. Sleep is not a luxury — it is a biological necessity that, when consistently disrupted, affects every system in the body.
Strategies that work without medication
Sleep medications can be helpful in the short term, but they carry significant risks in older adults: night-time falls from residual sedation, confusion on waking, dependency that makes sleeping without them progressively harder, and rebound insomnia when stopping. The recommended first-line treatment in current international guidelines is Cognitive Behavioural Therapy for Insomnia (CBT-I), which focuses on changing the habits and thought patterns associated with sleep.
Many sleep hygiene measures are straightforward, and families can help put them into practice. The most important thing is consistency: applying them for one night is not enough — they need to be maintained for at least two weeks before results start to show. The brain needs time to recalibrate its internal clock and learn to associate the bed with rest again.
Daytime physical activity also has a proven effect on sleep quality. A twenty-minute morning walk, seated chair exercises, or even gentle arm and leg movements help expend the energy the body needs in order to demand rest at night. Total inactivity during the day is one of the greatest enemies of night-time sleep.
When to seek medical help
Not all insomnia resolves with sleep hygiene alone. Some signs indicate that professional help is needed. The GP is the right first point of contact and can refer to a sleep clinic if necessary. It is important not to accept insomnia as inevitable or to resign yourself to the idea that older people simply sleep worse — there are effective treatments for the majority of cases.
It is also worth reviewing your loved one's current medications with their doctor. Sometimes a simple change in the timing of a drug — such as moving a diuretic from the afternoon to the morning — or switching to an alternative with fewer sleep-related side effects can improve rest considerably without adding anything new.
If sleep apnoea is suspected, particularly in people with loud snoring, breathing pauses at night, and intense daytime sleepiness, a referral to a sleep clinic is important. Untreated apnoea worsens cardiovascular risk and cognitive decline, and can be effectively managed with continuous positive airway pressure (CPAP) devices.
How families can help from a distance
If you do not live with your loved one, there are still meaningful ways to support their sleep. An afternoon phone call at the same time each day helps create structure and reduces the emotional activation that disrupts sleep at night. Asking what they did during the day, whether they went for a walk, whether they ate well — these simple questions help them mentally organise their day and close it with a sense of order.
You can also help them spot patterns. If every time you speak they mention sleeping badly, make a note. If it coincides with medication changes, lonelier weeks, or episodes of pain, that information will be invaluable for their doctor. Families are often the best observers of their parents' sleep.
Do not underestimate the power of a goodnight routine. Many older people who live alone go to bed with the television on because there is no one to say goodnight to. That absence of emotional closure makes the transition to sleep harder. A brief evening call can be the ritual they need to let go of the day's worries and settle.
Evening conversation as a bedtime ritual
One of the factors that most disrupts sleep in older adults is emotional activation at night — the worries that surface once everything goes quiet. Intrusive thoughts about health, money, loneliness, or the future tend to intensify at night, when nothing counterbalances them. Having a calm conversation in the late afternoon helps process the day, release built-up tension, and prepare the body for rest.
This is not therapy. It is something simpler and more human: someone to talk to who listens, asks how the day went, and takes a genuine interest in the small details. That social connection at the end of the day acts as a natural closing signal for the mind and eases the transition into sleep. Studies confirm that older adults who have a meaningful afternoon conversation fall asleep faster and report more satisfying rest.
For people who live alone, this evening conversation can be transformative. It makes the difference between going to bed with a head full of circular thoughts and doing so feeling that someone has heard how their day went. That emotional closure, simple as it may seem, is one of the best natural sleep aids there is.