Sleep and Your Health

Why good sleep matters and what to do when restful sleep becomes difficult

Sleep is sometimes treated as the part of the day we can shorten whenever life becomes busy.

But sleep is not wasted time.

While you sleep, your brain processes memories, your body repairs tissues, your immune system remains active and important systems involved in mood, appetite and cardiovascular health are regulated. Poor sleep can affect how you feel, think, work, drive and respond to stress the following day.

An occasional bad night is normal. The concern is a persistent pattern of insufficient, disrupted or unrefreshing sleep that interferes with your health or daytime functioning.

How much sleep do adults need?

Australia’s updated 24-hour movement guidelines recommend:

• Adults aged 18–64: seven to nine hours of good-quality sleep
• Adults aged 65 and over: generally seven to eight hours of good-quality sleep
• Consistent bedtimes and wake-up times where practical

These are useful ranges rather than strict rules.

Some people naturally function well near one end of the range. Sleep needs can also change temporarily during illness, pregnancy, recovery from intense exercise or periods of unusual stress.

The better question is not only, “How many hours did I sleep?” It is also:

• Do I usually wake feeling reasonably refreshed?
• Can I stay alert through the day?
• Is sleepiness affecting my concentration, mood or safety?
• Am I relying heavily on caffeine just to function?

Spending eight hours in bed does not necessarily mean obtaining eight hours of restorative sleep.

Sleep changes through the night

Sleep is not one continuous state.

You move through several stages, including lighter sleep, deeper sleep and rapid eye movement sleep. These stages repeat in cycles and perform different functions.

Brief awakenings can occur between cycles and are often normal. Many people wake during the night, turn over and return to sleep without remembering it.

Sleep also tends to become lighter and more fragmented with age. That does not mean persistent exhaustion, severe insomnia or excessive daytime sleepiness should automatically be dismissed as normal ageing.

What commonly disrupts sleep?

Sleep can be affected by many factors, including:

• Stress, grief or anxiety
• Depression or other mental health conditions
• Pain
• Menopause symptoms
• Pregnancy
• Shift work
• Jet lag
• Caring responsibilities
• Alcohol, nicotine or caffeine
• Some prescription and non-prescription medicines
• Restless legs
• Obstructive sleep apnoea
• An irregular sleep schedule
• Excessive time awake in bed

Often more than one factor is involved.

Trying to solve every sleep problem with the same remedy is therefore unlikely to work. The right approach depends on what is disturbing the sleep.

Build a reliable sleep rhythm

Your body uses an internal clock to coordinate sleep and wakefulness.

A regular wake-up time is often one of the most useful anchors for that clock. Sleeping very late after a poor night may provide temporary relief but can make it harder to fall asleep the following evening.

Helpful habits include:

• Waking at approximately the same time each day
• Getting natural daylight soon after waking
• Being physically active during the day
• Avoiding very long or late naps
• Going to bed when sleepy rather than simply because the clock says so
• Keeping weekends reasonably close to your weekday rhythm

Perfect consistency is unnecessary. The aim is to give your body a predictable pattern most of the time.

Create conditions that support sleep

A good bedroom cannot overcome every sleep disorder, but it can remove avoidable obstacles.

Try to keep the bedroom:

• Dark
• Quiet
• Comfortably cool
• Comfortable and uncluttered
• Mainly associated with sleep and intimacy

An eye mask, earplugs, fan or white noise may help in some environments.

Turn clocks away if repeatedly checking the time makes you more anxious. A visible clock can turn a normal period of wakefulness into a running calculation about how little sleep remains.

Be thoughtful about screens

Phones, tablets and televisions can delay sleep in several ways.

Bright light in the evening may affect the body clock, while messages, work, news, games and social media can keep the brain alert. The content may matter as much as the light.

A realistic approach may be to:

• Reduce stimulating screen use during the final hour before bed
• Dim the display and room lighting
• Avoid doing work in bed
• Silence non-essential notifications
• Keep the phone out of reach if habitual checking is a problem

Listening to calm audio with the screen off may be less disruptive than actively scrolling.

Understand caffeine and alcohol

Caffeine can remain active for several hours.

Coffee, tea, energy drinks, cola, chocolate and some medicines may interfere with sleep, even when you can still fall asleep reasonably quickly. People vary considerably in their sensitivity.

Consider moving your final caffeinated drink earlier, particularly if you struggle to fall asleep or wake frequently.

Alcohol may make you feel sleepy initially, but it can fragment sleep later in the night and worsen snoring or sleep apnoea. It may also lead to earlier waking and poorer sleep quality.

Using alcohol regularly as a sleep aid can create additional health and dependence problems.

What is insomnia?

Insomnia involves difficulty falling asleep, staying asleep or returning to sleep after waking, together with impaired daytime functioning.

Chronic insomnia disorder generally means the problem occurs at least three nights each week, continues for at least three months and affects daytime life.

Common daytime effects include:

• Fatigue or sleepiness
• Reduced concentration
• Poor memory
• Irritability
• Low motivation
• Anxiety about sleep

Insomnia can sometimes begin during stress, illness or disruption. It may then continue because the person spends more time awake in bed, sleeps irregularly or becomes increasingly anxious about not sleeping.

Do not force sleep

Trying very hard to sleep often makes sleep less likely.

When you remain awake and frustrated in bed, your brain may gradually learn to associate the bed with alertness and worry.

It may help to:

1. Go to bed when genuinely sleepy.
2. Use the bed mainly for sleep.
3. If you remain awake and increasingly frustrated, get up.
4. Do something quiet in dim light.
5. Return to bed when sleepiness returns.
6. Keep your regular morning wake-up time.

This approach forms part of cognitive behavioural therapy for insomnia, commonly called CBT-I.

CBT-I addresses the habits, thoughts and behaviours that maintain insomnia. It is a proven first-line treatment and generally provides more durable benefit than relying indefinitely on sleeping tablets.

When might sleep apnoea be the problem?

Obstructive sleep apnoea occurs when the upper airway repeatedly narrows or closes during sleep, interrupting breathing and disturbing sleep.

Possible signs include:

• Loud habitual snoring
• Pauses in breathing noticed by another person
• Waking while choking or gasping
• Morning headaches
• Dry mouth on waking
• Unrefreshing sleep
• Excessive daytime sleepiness
• Poor concentration
• Frequently waking to urinate

Sleep apnoea can occur in people of different body sizes, although excess weight can increase risk.

Speak with your GP if these features are present. Assessment may involve a sleep study at home or in a sleep laboratory.

Snoring alone does not prove sleep apnoea, and not everyone with sleep apnoea is aware of snoring.

Medicines and supplements

Sleeping tablets can be useful for selected people and circumstances, but they are not a complete solution to chronic insomnia.

Some can cause:

• Morning sedation
• Memory or concentration problems
• Falls
• Impaired driving
• Tolerance or dependence
• Rebound insomnia when stopped

Older people may be particularly vulnerable to adverse effects.

Melatonin can help in specific situations, including some disturbances of the body clock, but it is not equally effective for every sleep problem. Product quality, dose and timing also matter.

Discuss regular sleep medicines, sedating antihistamines, herbal products or supplements with your GP or pharmacist. Do not combine sedatives with alcohol or alter prescribed treatment without advice.

When to seek professional help

Speak with your GP when:

• Poor sleep persists despite reasonable self-care
• Insomnia affects daytime functioning
• You regularly struggle to stay awake
• Snoring is accompanied by choking or breathing pauses
• Sleepiness affects driving or work safety
• Pain, mood symptoms, restless legs or menopause symptoms disturb sleep
• You rely on alcohol or sedating medicines to sleep
• Your sleep pattern changes suddenly without an obvious explanation

Seek urgent help if sleep deprivation is accompanied by severe mental-health symptoms, thoughts of self-harm, marked confusion or behaviour that creates immediate danger.

Do not drive when you are struggling to remain awake.

Start with one change

Choose one step that is realistic enough to repeat:

• Set a consistent wake-up time
• Get outside into morning light
• Move your final coffee earlier
• Reduce evening alcohol
• Keep your phone away from the bed
• Arrange a GP review for loud snoring and daytime sleepiness
• Leave the bed briefly when you are awake and frustrated

Avoid trying ten new sleep rules on the same night. One consistent change is easier to assess and maintain.

The bottom line

Sleep is a basic part of good health, not an optional luxury.

Most adults need approximately seven to nine hours, while many older adults need around seven to eight hours. Quality, regularity and daytime functioning matter alongside the total number of hours.

Good routines can improve many sleep problems, but persistent insomnia, excessive daytime sleepiness, loud snoring or interrupted breathing deserve proper assessment.

The goal is not perfect sleep every night. It is a sustainable pattern that allows you to wake reasonably refreshed, remain alert and function safely through the day.