Balance Board Trainer | mysimulator.uk

Exercise / Stance

Board dome height (difficulty) 0.22 m

Core fatigue rate 1.0×

Session length 60 s

Weight Shift Control

Hold arrow keys / WASD, or the pad below, to shift your weight and tilt the board. Keep the ball inside the green target ring.

Live Readouts

Time remaining

60.0 s

In target zone

Sway path length

0.00 m

Ball drops

Core stability100%

How it works

The board rests on a hemispherical dome of radius R, so tipping it behaves like an inverted pendulum with a gravity restoring torque:

I·θ" = -m·g·R·sin(θ) + τ_you - b·θ'

τ_you is the corrective torque from your weight-shift input, capped by your current core-strength — which drains while you hold a large tilt and slowly regenerates near center, modeling real muscular fatigue during a balance-training set:

τ_max(t) = τ_base · (0.35 + 0.65 · core/100)

The ball on top is a solid sphere rolling without slipping on the tilted surface, so its acceleration along the slope follows the standard rolling-sphere result (5/7, not 1, because some energy goes into the ball's own spin):

a = (5/7)·g·sin(θ) − friction

Two-Leg Stance — wide base of support, small dome radius: high stability, gentle fatigue.
Single-Leg Stance — narrow base, larger effective dome radius: much less stable in every direction, drains core fast.
Tandem Stance — feet heel-to-toe: stable front-to-back but very unstable side-to-side, reflecting the real asymmetry of tandem balance found in physical-therapy research.

Sway path length and time in target zone are the same metrics clinicians use on force-plate posturography to score balance-training progress.

Two-Leg Stance Tilt: 0.0°

60.0s

BALL DROPPED

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