Home▸Physics & Mechanics▸Fitness Running Simulation: 2D Stride Mechanics

🏃 Fitness Running Simulation: 2D Stride Mechanics

Side-view 2D spring-mass (SLIP) model of a running stride: adjust speed, leg stiffness, leg length, body mass and gravity, and watch step length, contact time, flight time and the vertical ground-reaction force respond live. Drag the runner up and release it for a drop test.

Physics & Mechanics2DModerate60 FPS📱 Mobile-adapted⇄ 3D version

Details

CategoryPhysics & Mechanics

RenderingCanvas 2D

DifficultyModerate

Target FPS60

ControlsSliders for target speed, apex height, leg stiffness, leg length, body mass and gravity (with Moon/Mars/Earth/Jupiter shortcuts); toggle the auto-balance controller or set the touchdown angle by hand; presets (Jog, Run, Sprint, Soft leg, Stiff leg, Moon run, Passive); pause, step, slow motion and reset; spring-model and strobe overlays; drag the runner vertically and release to drop it.

runningbiomechanicsspring-mass modelstride lengthground reaction forcegait

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⚙ Under the hood

runningbiomechanicsspring-mass modelstride lengthground reaction forcegait

2D · HTML5 Canvas 2D · 60 FPS target · runs fully client-side, no install