Sleepless Nights? Breaking the Stress-Anxiety-Insomnia Cycle

How stress and anxiety disrupt sleep

When you’re stressed or anxious, your body’s alarm system kicks in. The HPA axis (hypothalamus–pituitary–adrenal) signals your adrenal glands to release cortisol. This hormone readies you to handle challenges by increasing alertness, raising blood sugar, and tensing muscles. That’s helpful in a crisis, but not at bedtime. If cortisol levels remain elevated in the evening, it’s like trying to sleep with the gas pedal pressed down. Your brain and body stay “on,” making it hard to fall or stay asleep.

This state is often called hyperarousal. It means your nervous system is revved up. You might feel your heart racing, muscles tight, or your mind buzzing with thoughts. Over time, hyperarousal also trains your brain to associate bedtime with stress. If you lie awake worrying, you learn “bed = stress.” This creates a vicious cycle: stress leads to poor sleep, and poor sleep increases stress. Insomnia researchers describe exactly this loop as a self-reinforcing insomnia cycle.

In short, stress and anxiety at night are not your fault; they are part of a physiological stress response. Recognising this can help reduce frustration and guide you to solutions that reverse the cycle.

Common sleepless-night experiences

Here are some typical patterns many people notice. These are not signs of weakness, just clues that stress is at work:

• Mind racing at bedtime: As soon as you hit the pillow, thoughts start running – planning tomorrow, replaying arguments, or wondering why you can’t sleep. This is a classic stress reaction.
• Falling asleep then waking at 2–3 AM: You nod off, then a few hours later you’re suddenly awake and alert. That often happens when cortisol or adrenaline spikes in the night.
• Wired but tired: Feeling exhausted and yet unable to relax. Hyperarousal can make your body feel like it’s running on empty gas.
• Worrying about sleep: The more you focus on “I have to sleep 8 hours,” the harder it is. Anxiety about not sleeping triggers more alertness.

These experiences are common under stress. They just mean your stress response needs to be dialled down.

Evidence-based ways to break the cycle

The good news: there are simple, research-backed steps you can take, starting tonight. You don’t need to do them all at once. Pick a couple, try them consistently, and see what works for you.

1. Create a calming wind-down routine

Signal to your body that it’s time to turn down the engines. About 30–60 minutes before bed, do a predictable sequence of relaxing activities:

• Dim the lights: Low light boosts melatonin (the sleep hormone) and tells your brain night is coming.
• Quiet activities only: Shut off screens (TV, phones, tablets). Blue light keeps the brain awake. Instead, read a book, listen to gentle music, or do light stretches.
• Grab a light snack: A small banana or nut butter can curb hunger without spiking energy. Avoid heavy meals or lots of fluid right before bed.
• Write a quick to-do list (5 min): See next section.
• Do a slow breathing exercise: (details in tip #2). Just 2–5 minutes can help lower alertness.

Then get into bed when you feel naturally sleepy. Try to keep a regular sleep schedule: waking at the same time each morning helps set your body clock. Even on weekends, aim for consistency.

2. Do a simple breathing exercise

Breathing can directly flip the switch on your stress response. A popular and effective method is 4-6 breathing: inhale gently through your nose for a count of 4, then exhale slowly for a count of 6. Repeat 2–4 minutes.

The key is making the exhale longer than the inhale. This slower rhythm activates the parasympathetic (rest-and-digest) system. You can do this sitting up on your bed or even once you’re lying down, right before lights out. Many people find a few cycles of slow breathing alone makes them feel noticeably calmer.

3. Try a 5-minute brain dump

One study had people write a brief to-do list at bedtime. Those who listed tomorrow’s tasks fell asleep faster than those who listed completed tasks. The act of jotting things down frees your mind from obsessing over them.

Keep it practical: bullet-point tasks and reminders for tomorrow. Avoid emotional journal entries at that moment. After writing, put the paper aside and mentally close the tab on those worries. Often, you’ll notice it’s easier to let go of them once they’re on paper.

4. Time your caffeine carefully

Caffeine’s effects can last much longer than you’d think. In one sleep study, caffeine taken 6 hours before bedtime still significantly reduced total sleep time.

If you’re sensitive to sleep disruption, try cutting off caffeine by early afternoon (around lunchtime). You might still enjoy a decaf coffee or herbal tea later. Pay attention to all caffeine sources: coffee, tea, colas, energy drinks, even chocolate.

5. Keep bedroom habits sleep-friendly (stimulus control)

Part of CBT-I is called stimulus control. It means making your bed a cue for sleep, not wakefulness:

• If you can’t sleep (laying awake 20+ minutes), get out of bed and do something calming in dim light. Only return when sleepy.
• Use the bed only for sleep (and intimacy). Avoid reading, working, or watching TV in bed.
• Don’t watch the clock. Clock-watching can increase stress about not sleeping.

This might feel odd at first, but over days it helps your brain re-learn that “bed” = “sleep” again.

6. Practice good sleep hygiene

Sleep hygiene means simple healthy habits. These on their own rarely cure chronic insomnia, but they set a good foundation. Key points:

• Bedroom environment: Keep it cool (around 16–20°C), dark, and quiet. Consider earplugs or a fan for noise.
• Limit alcohol: A nightcap can help you fall asleep faster, but it fragments sleep later. Keep drinks light in the evening.
• Regular exercise: Being active in the day generally improves sleep. Try to finish vigorous exercise at least a few hours before bed, as it can be stimulating.
• Avoid screens before bed: TV, phones, tablets all emit blue light, which tricks your brain into thinking it’s daytime. Reading a book or listening to an audiobook is better.

7. Sample wind-down routine

Here’s an example you can adapt:

• 9:00 PM: Finish dinner, dim the lights, turn off work screens.
• 9:15 PM: Prepare for bed (bathroom, skincare), and write a quick to-do list or journal bullet points (5 minutes).
• 9:20 PM: Do 3–4 cycles of 4-6 breathing. Sip a non-caffeinated herbal tea or warm milk.
• 9:30 PM: Read or meditate in low light. Lightly stretch or do gentle yoga.
• 10:00 PM: Lights out, in bed to sleep.

Repeat each night roughly the same way. Over time, your brain learns this is the cue to wind down.

When to seek extra support

If you try these steps consistently for a couple of weeks and your sleep is still very poor, it’s time to get more help. Talk with your GP or a sleep specialist if you have:

• Chronic insomnia: Trouble sleeping ≥3 nights/week for ≥3 months with daytime impact.
• Severe daytime effects: Uncontrollable sleepiness, mood drops, or anxiety.
• Other symptoms: Loud snoring/gasping (possible sleep apnoea), leg discomfort (restless legs), or suspected medical issues.
• Mental health concerns: If anxiety or depression worsens.

New Zealand has free resources: Healthify’s insomnia guide and the Wellbeing Support offer advice. You can also call or text 1737 anytime for free counselling help.

Professional treatment can include cognitive behavioural therapy for insomnia (CBT‑I), either one-on-one or group-based. NZ GPs sometimes refer patients for CBT-I or use approved online programs. These approaches have strong research behind them and can provide lasting improvement.

References

1. Riemann D, Baglioni C, Bassetti C, et al. Chronic insomnia, REM sleep instability and emotional dysregulation: A pathway to anxiety and depression? J Sleep Res. 2025;34:e14605. https://pmc.ncbi.nlm.nih.gov/articles/PMC11911052/
2. de Souza Bezerra ML, Silva L, Tufik S, et al. The HPA axis and monoaminergic systems: A link to insomnia with clinical implications. Nat Sci Sleep. 2022;14:1091–1105. https://pmc.ncbi.nlm.nih.gov/articles/PMC9153981/
3. Edinger JD, Arnedt JT, Bertisch SM, et al. Behavioral and psychological treatments for chronic insomnia disorder in adults: An AASM clinical practice guideline. J Clin Sleep Med. 2021;17(2):255–262. https://pubmed.ncbi.nlm.nih.gov/33164742/
4. Trauer JM, Qian MY, Doyle JS, Rajaratnam SMW, Cunnington D. Cognitive Behavioral Therapy for Chronic Insomnia: A Systematic Review and Meta-analysis. Ann Intern Med. 2015;163(3):191–204. https://doi.org/10.7326/M14-2841
5. Drake C, Roehrs T, Shambroom J, Roth T. Caffeine effects on sleep taken 0, 3, or 6 hours before going to bed. J Clin Sleep Med. 2013;9(11):1195–1200. https://pmc.ncbi.nlm.nih.gov/articles/PMC3805807/
6. Scullin MK, Krueger MA, Ballard HK, Pruett N, Bione KE. The Effects of Bedtime Writing on Difficulty Falling Asleep: A Polysomnographic Study Comparing To-Do Lists and Completed Activity Lists. J Exp Psychol Gen. 2018;147(1):139–146. https://pmc.ncbi.nlm.nih.gov/articles/PMC5758411/
7. Zaccaro A, Piarulli A, Laurino M, et al. How Breath-Control Can Change Your Life: A Systematic Review on Psycho-Physiological Correlates of Slow Breathing. Front Hum Neurosci. 2018;12:353. https://www.frontiersin.org/articles/10.3389/fnhum.2018.00353/full