Allostatic Load Simulator | mysimulator.uk

Stress Load

Stressor intensity 55

Stressor frequency 6 / min

Recovery / resilience 50

Sleep & rest quality 60

Live State

Allostatic load

0.0

10-yr disease risk

Avg biomarker deviation

Biomarkers

How it works

Each biomarker i (cortisol, blood pressure, heart-rate variability, inflammation/CRP, glucose) has a deviation x_i from its healthy set-point. A stressor event pushes every marker up by an amount proportional to intensity; between events each marker relaxes back toward baseline — this is allostasis, the adaptive stress response working as intended:

dx_i/dt = -k · x_i          (relax to baseline)
event:   x_i += intensity · w_i     (w_i = marker's own sensitivity)
k = recovery_rate · (0.4 + 0.6 · sleep_quality)

Recovery only becomes a problem when stressors arrive faster than the system can relax, or when resilience/sleep is too low for the relaxation rate k to keep up. The unresolved surplus is allostatic load — McEwen & Stellar's term for the cumulative "wear and tear" of a stress-response system that keeps firing without enough recovery time:

dL/dt = gain · Σ max(0, x_i − θ_i) − decay_L · L
risk(%) = 100 / (1 + exp(−(L − L0) / s))

Every small red-lit point on the surrounding shell is a unit of simulated tissue with its own random damage threshold — as L climbs past a point's threshold it "lights up" red, visualising cumulative wear the way inflammaging or micro-vascular damage accrues unevenly across a real body.

Stressor intensity / frequency — how hard and how often the system gets hit.
Recovery / resilience — the baseline relaxation rate k; higher means faster return to homeostasis.
Sleep & rest quality — a multiplier on k (and a small damper on load's gain), modelling why poor sleep amplifies the physiological cost of the same stressor.
Trigger acute stressor — fires one manual impulse on top of the automatic Poisson-timed stream, so you can see a single event's decay curve in isolation.

Homeostatic core (load) Biomarker orbit rings Cumulative wear (shell)

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