The relationship between stress and sleep quality

Sleep and stress are closely connected. While occasional stress is a normal part of life, ongoing stress can influence how easily aperson falls asleep, how often they wake during the night and how rested they feel the next day.

Understanding how stress affects sleep quality can help people recognise patterns in their own sleep and identify when additional support may be helpful.

What is sleep quality?

Sleep quality refers to how restorative and uninterrupted sleep is, rather than simply the number of hours spent asleep. Good sleep quality generally includes:

• Falling asleep within a reasonable period of time
• Staying asleep through most of the night
• Experiencing sufficient deep and REM sleep cycle
• Waking feeling relatively rested

Someone may spend enough time in bed but still experience poorsleep quality if sleep is frequently interrupted or if it takes a long time to fall asleep.

How stress affects the body at night

When the body experiences stress, the brain activates the stress response system, releasing hormones such as cortisol and adrenaline.These hormones increase alertness and prepare the body to respond tochallenges.

While this response is useful during the day, elevated stress levels later in the evening may interfere with the body’s ability to transition into sleep.

The body may remain in a more alert state than usual, which can make it harder for the brain to shift into the physiological processes that support sleep (McEwen, 2007).

Ways stress can affect sleep quality

Stress may affect sleep in several ways. Some people notice difficulty falling asleep, while others experience disrupted sleep throughout the night.

Common patterns associated with stress-related sleep disruption include:

• Taking longer than usual to fall asleep
• Waking during the night and finding it difficult to return to sleep
• Waking earlier than intended
• Feeling mentally active at bedtime
• Experiencing     lighter or less restorative sleep

These experiences can occur occasionally for many people. However, if they occur frequently, they may indicate that stress is affecting sleep patterns.

Why poor sleep can increase stress

The relationship between sleep and stress works in both directions.

Sleep plays an important role in emotional regulation and cognitive processing. When sleep is reduced or disrupted, the brain may becomemore reactive to everyday stressors.

Research suggests that insufficient sleep may increase activity in areas of the brain involved in emotional responses, while reducing the brain’s ability to regulate those responses effectively (Walker & vander Helm, 2009).

As a result, poor sleep may contribute to feeling more overwhelmed by challenges that might otherwise feel manageable.

Recognising the sleep–stress cycle

For some people, stress and sleep disruption can become part of a repeating cycle:

1. Stress makes it harder to fall asleep or stay asleep.
2. Reduced or fragmented sleep leads to fatigue and reduced emotional regulation.
3. Daily challenges feel more difficult to manage.
4. Increased stress then further disrupts sleep.

Understanding this pattern can help individuals recognise that sleep difficulties are sometimes influenced by broader stress levels rather than sleep habits alone.

Factors that may contribute to stress-related sleep disruption

Many factors may influence the relationship between stress and sleep quality. These can include:

• Work or financial pressures
• Major life changes
• Ongoing health concerns
• Irregular sleep routines
• Environmental factors such as noise or light

Because sleep and stress are influenced by multiple factors, addressing sleep difficulties often involves considering overall lifestyle and wellbeing.

When to consider speaking with a healthcare professional

Occasional sleep disruption or periods of increased stress are common. However, if sleep difficulties persist or begin to affect daily functioning, it may be helpful to discuss these concerns with a health careprofessional.

A clinician can help assess possible contributing factors and discuss appropriate management options based on individual circumstances.

References

Hirshkowitz, M., Whiton, K., Albert, S. M., Alessi, C.,Bruni, O., DonCarlos, L., et al. (2015). National Sleep Foundation’s sleep time duration recommendations: methodology and results summary. Sleep Health, 1(1), 40–43.

McEwen, B. S. (2007). Physiology and neurobiology of stress and adaptation: central role of the brain. Physiological Reviews, 87(3), 873–904.

Medic, G., Wille, M., & Hemels, M. E. (2017). Short-and long-term health consequences of sleep disruption. Nature and Science of Sleep, 9, 151–161.

Walker, M. P., & van der Helm, E. (2009). Overnight therapy? The role of sleep in emotional brain processing. Psychological Bulletin, 135(5), 731–748.

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Disclaimer: This information is not intended to be used as medical advice or a substitute for your own practitioner’s advice, nor is it intended to be used for diagnosis or treatment for any illness/disease.