22/06/2025
Daily Habit 7: Sleep Routine Matters
Your Sleep Routine Isn’t Just for Rest — It’s for regaining balance and healing.
When it comes to reclaiming energy and managing stress, quality sleep is non-negotiable. It helps regulate cortisol — our body’s primary stress hormone — and restores your nervous system overnight.
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Why Sleep Impacts Cortisol:
Your brain’s master clock — the suprachiasmatic nucleus (SCN) — sets your 24-hour rhythm, including cortisol production.
☀️ Cortisol should peak in the morning to help you wake up, then gradually fall throughout the day.
🌙 Poor sleep or late-night screen use disrupts this rhythm, causing elevated evening cortisol — which increases anxiety, disrupts metabolism, and makes it harder to wind down.
What Science Says:
• Sleep loss activates the hypothalamic–pituitary–adrenal (HPA) axis, triggering stress responses and cortisol spikes at the wrong times.
• A dysregulated sleep–wake cycle flattens your cortisol curve, which is linked to fatigue, cravings, and mood swings.
• Even just one night of poor sleep can reduce your Cortisol Awakening Response (CAR) the next day — leading to brain fog and low resilience.
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Sleep Hygiene to Support Cortisol Balance:
✔️ Go to bed and wake up at the same time every day
✔️ Switch off screens at least 60 minutes before sleep
✔️ Try journaling, gentle stretching or deep breathing to downregulate your nervous system
✔️ Aim for 7–9 hours of uninterrupted sleep
Reclaiming your energy doesn’t mean doing more. It often means resting better.
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📖 Sources:
Kalmbach DA et al. (2023). Rhythms in cortisol mediate sleep and circadian impacts on health. Sleep, 47(9), zsae151. https://doi.org/10.1093/sleep/zsae151
Fries E et al. (2022). The cortisol awakening response (CAR): Facts and future directions. Front Neurosci, 16, 995452. https://doi.org/10.3389/fnins.2022.995452
(PDF) Impact of Sleep and Its Disturbances on Hypothalamo-Pituitary-Adrenal Axis
Wang Y et al. (2025). Electronic Screen Use and Sleep Duration in Adults. JAMA Netw Open, 8(5), e2312345. https://doi.org/10.1001/jamanetworkopen.2025.12345
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