Allostatic Load Simulator | mysimulator.uk

Lifestyle Inputs

Sleep quality 70

Exercise level 50

Diet quality 60

Social connection 55

Chronic stress exposure 40

Whole-Body State

Allostatic Load Index

Systems overloaded

0 / 4

Resilience reserve

100%

Systems

Cardiovascular0

Metabolic0

Immune0

Neuroendocrine0

How it works

Allostatic load is the cumulative "wear and tear" on the body's regulatory systems when they are repeatedly activated to cope with stress (McEwen & Stellar, 1993). Four systems are tracked here, each with its own load L_i ∈ [0,100]:

dL_i/dt = k_s · S · sens_i  −  k_r · R_i  −  k_h · (L_i − L₀)

S    = chronic stress exposure (0–1)
R_i  = w_sleep·sleep + w_exercise·exercise + w_diet·diet + w_social·social
sens_i = system-specific sensitivity to stress
k_h  = homeostatic pull back toward baseline L₀ = 30

Each system weighs the four lifestyle inputs differently: cardiovascular recovers most from exercise, immune from sleep, metabolic from diet, and neuroendocrine from social connection (the strongest known buffer against cortisol/HPA-axis activation). The Allostatic Load Index is the mean of the four L_i; a system is "overloaded" once its own load exceeds 70. Resilience reserve is 100 − ALI: how much regulatory capacity remains before sustained overload becomes chronic disease risk (hypertension, insulin resistance, immunosuppression, anxiety/depression — the real downstream correlates of allostatic overload).

Acute stress event — injects a short, sharp stress pulse (e.g. a major deadline or life event) into all four systems, scaled by each system's sensitivity, then lets the same recovery dynamics play out.
Sliders — change the steady-state lifestyle inputs; the system loads drift toward a new equilibrium in real time rather than jumping instantly, exactly like real physiological adaptation.

Homeostasis core Stress load motes

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