Your heart rate rises a little on every inhale and falls on every exhale. Breathing slowly, at around six breaths a minute, makes that swing larger and steadier. That is what heart rate variability training builds. Follow the light with your breath.
How it works
InhaleAs the light grows, breathe in and press and hold anywhere on the screen (finger, mouse, or hold the spacebar). Your hold tells the instrument you're on the in-breath.ExhaleAs the light fades, breathe out and release your hold. Empty fully before the next rise.FollowHold on the rise, release on the fall. The glow deepens and the tone opens as you stay in rhythm. That is coherence building.
Choose your pace
Choose your session
How stressed are you right now?
CalmVery stressed
The effect comes from your breath, not the screen. Most people's resonance pace sits between about 5.5 and 6 breaths a minute, so pick whichever feels easiest to sustain. The light keeps the pace. Your breath does the work.
Hold as the light grows · Release as it fades · Spacebar works too
Paused
Hold the stillness.
The light is waiting. There is no hurry.
Session complete
Settled.
How do you feel now?
CalmVery stressed
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Before
→
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After
0
Coherence
0s
Longest sync
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2nd-half shift
3:00
Time in session
Coherence is the share of the session your hold-and-release rhythm matched the light. Above 50% on an early run is strong — and it climbs quickly with practice.