the body

Health, as instruments you can run.

Everything here runs in your browser and keeps nothing. None of it diagnoses anything, and none of it is advice. They are instruments for noticing — a rhythm you are already in, a loop that is already resonating, a gradient the air is already applying to your skin.

rhythm

circadian →the 24-hour cycle — when your nervous system expects light, food and dark

vagal toning →the nerve of rest and digest, and what actually raises its tone

synchronize →paced breathing at the resonance frequency, drawn

movement →integration — load the body in the window where load builds it

mechanism

the blood →the baroreflex is a delayed feedback loop, and a delayed loop is a resonator — which is why 0.1 Hz shows up in the heart-rate spectrum

the lung →branching geometry, made audible

the knot →the skin–air vapour-pressure gradient — what the air is doing to you, read at skin temperature rather than air temperature

over time

coherence over time →your own readings, plotted — how coherence moves and how it returns

not built

A combined reading. Each instrument above reports its own quantity and none of them talk to each other, so there is no single number for how you are and this page does not pretend otherwise. Joining them needs a theory of what the shared quantity is — circadian phase, vagal tone, baroreflex resonance, breath and thermal load are not obviously commensurable, and asserting a combined score before that argument exists would be inventing a measurement. That argument is the next thing to write, not the next thing to ship.

The theory these sit under is at the framework. The measure they are all circling is at coherence. Everything else is on the map.