Your Biological Clock & Sleep: What Is the Circadian Rhythm and How to Improve It

Ο circadian rhythm (circadian rhythms) are your body’s internal biological clock—a natural cycle of about 24 hours that regulates when you feel awake, when you feel tired, when you’re hungry, and when you have energy. According to the National Sleep Foundation, this clock is primarily controlled by light (especially the natural sunlight) and directly affects the the quality of your sleep, your productivity, mood, and overall health.

When your circadian rhythm is «synchronized,» you sleep deeply and wake up feeling refreshed. When it is disrupted (e.g., by irregular hours, lack of light, or screen time at night), it can lead to insomnia, fatigue, irritability, and long-term health problems.

How does the circadian rhythm work?;

• Morning: Natural light (especially the blue spectrum) suppresses melatonin (the sleep hormone) → you wake up and feel energized.
• Noon – Afternoon: Alertness and body temperature reach their peak.
• Evening: Darkness → increase in melatonin → sleepiness.
• Night: Deep sleep & REM → physical and mental rejuvenation.

What's bothering him (and how it affects you)

• Irregular sleep/wake schedule
• Lack of morning light (working in a dark office, winter)
• Blue light from screens after 9:00 p.m.
• Caffeine/alcohol, slowly
• Stress & Anxiety (High Cortisol)

Result: difficulty falling asleep, frequent awakenings, light sleep, waking up feeling tired.

How to Resynchronize Your Circadian Rhythm

1. Morning light – right away Open the curtains or go outside for 10–15 minutes as soon as you wake up.
2. Fixed schedule Go to bed and wake up at the same time every day (±30 minutes).
3. Evening «dark» routine Dim your lights and screens 1–2 hours before bedtime. Use warm lighting (2700K).
4. Your mattress plays a crucial role A high-quality mattress helps the body relax quickly and stay in a deep sleep:
   • Vispring & Treca Paris – Natural materials (wool, horsehair, latex) for temperature regulation and relaxation.
   • Kluft & Aireloom – Talalay latex & support zones – reduce sleep interruptions caused by discomfort.
   • Simmons Beautyrest – Pocket-on-pocket + cooling gel – coolness & zero motion transfer.

Conclusion

Your circadian rhythm is like an internal clock that can be adjusted—or disrupted. With consistency, light, a proper routine, and a a really good mattress, you can sleep soundly and wake up feeling energized.

Come visit our showroom at southern suburbs and in the northern suburbs to try out mattresses that help the your circadian rhythm to «synchronize». You'll feel the difference right away—deeper sleep, a better day.

Schedule an appointment, your sleep deserves to be natural and perfect.