All Breathing Techniques
Double Inhale (3s + 1s) · Long Exhale (6s)

Cyclic Physiological Sigh Timer & Guide

Stanford-Studied Fastest Real-Time Stress Off-Switch — Immediate 60-second relief from acute stress, overwhelm, or tension.

Ready3s

Press Start below to follow the visual rhythm.

The Science Behind Cyclic Physiological Sigh

Research from Stanford University (Dr. Andrew Huberman & Dr. David Spiegel) found that 5 minutes of cyclic physiological sighing outperformed mindfulness meditation and box breathing for improving daily mood and lowering respiratory rate.

How to Practice

  1. Take a deep inhale through your nose filling about 80% of your lungs (3 seconds).
  2. Without exhaling, take one quick extra sip of air through your nose to top off your lungs (1 second).
  3. Exhale slowly and completely through your mouth for 6 seconds.

Key Benefits

  • Fastest biological method to offload excess carbon dioxide in real time
  • Re-inflates collapsed alveoli in the lungs with the second top-off sip of air
  • Delivers noticeable calm in just 2 to 3 breaths (under 30 seconds)

Frequently Asked Questions

Why do we take two inhales before exhaling?

Tiny air sacs in the lungs (alveoli) slightly flatten under stress. The second quick inhale pops them open so the long exhale can dump CO₂ much more efficiently.

Can I do just 3 physiological sighs at my desk?

Absolutely. Even 2 to 3 physiological sighs in a row are enough to reset your autonomic nervous system.

Try Another Breathing Technique

Box Breathing (4-4-4-4)
4s Inhale · 4s Hold · 4s Exhale · 4s Rest
4-7-8 Relaxing Breath
4s Inhale · 7s Hold · 8s Exhale
Coherent Resonance Breathing (5-5)
5s Inhale · 5s Exhale (6 Breaths/Min)
Cyclic Physiological Sigh
Double Inhale (3s + 1s) · Long Exhale (6s)
Morning Clarity Breath (4-2-4)
4s Inhale · 2s Hold · 4s Exhale
2-Minute Extended Exhale (4-6)
4s Inhale · 6s Exhale
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