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Regulate your nervous system in minutes. Master Box Breathing, 4-7-8 Sleep, and Coherent Resonance with animated visual cues and gentle 528 Hz harmonic chimes.
Autonomic regulation, vagal nerve activation, and mindful timing
Switch between Box Breathing (4-4-4-4), 4-7-8 Sleep, Coherent Resonance (5.5s), 7-11 Panic Relief, and Energizing breath.
Gentle phase-transition bell synthesizer keeps your timing synchronized without having to stare at the screen.
Live cycle counter, estimated heart rate reduction metrics, and session duration logs with CSV export.
Extended exhalations stimulate the cranial vagus nerve, releasing acetylcholine to rapidly slow resting heart rate.
Resonant 5.5-second cycles induce cardiovascular coherence, aligning heart rate variability with respiratory sinus arrhythmia.
Rhythmic Box Breathing dampens fight-or-flight adrenal firing, restoring executive function in high-stress environments.
Everything you need to know about Breathwork & HRV
Slow, rhythmic breathing—especially with prolonged exhalations—stimulates the vagus nerve, signaling the parasympathetic nervous system to lower heart rate and blood pressure.
Box Breathing (4s Inhale, 4s Hold, 4s Exhale, 4s Hold) is a tactical stress regulation technique used by Navy SEALs to maintain calm, sharp focus under high pressure.
Developed by Dr. Andrew Weil, the 4-7-8 pattern (4s Inhale, 7s Hold, 8s Exhale) acts as a natural nervous system sedative by maximizing oxygen absorption and prolonging the parasympathetic exhalation phase.
Explore anxiety attack logs, pomodoro timers, and eye rest timers.
All breathwork timing and meditation session histories run 100% locally in your web browser.
Breathing at 5.5 breaths per minute (5.5s Inhale, 5.5s Exhale) aligns heart rate variability (HRV) with blood pressure oscillations, inducing physiological coherence.
Yes! The tool includes soft 528 Hz synthesized audio bells that chime whenever the breathing phase changes (Inhale, Hold, Exhale), allowing guided practice with eyes closed.
Yes! Click 'Export Breath Logs (CSV)' to download a spreadsheet of your breathwork protocols, cycle counts, and mindful minutes.
Even 3 to 5 minutes once or twice daily can significantly lower chronic cortisol levels and improve daytime focus.
Yes! The interface is fully responsive across smartphones, tablets, and desktop workstations.
No. The Breathing Exercise & HRV Studio is 100% free with no sign-up or app download required.
Inhaling for 7 seconds and exhaling for 11 seconds rapidly counteracts hyperventilation and restores carbon dioxide balance in the blood during acute panic.
Yes! Click the speaker icon in the top header bar to toggle sound chimes on or off at any time.
If you experience any lightheadedness, stop breath holding immediately and return to a gentle, natural resting breath rhythm.