Home▸Space & Astronomy▸Bone Density and Muscle Atrophy

3D Skeletal Site Deconditioning Simulator

3D per-site microgravity deconditioning model: femoral neck, lumbar spine, tibia and calcaneus each lose bone density at their own real measured rate while the non-weight-bearing forearm barely changes, and thigh/calf/back muscle thin in step — pick which exercise devices (ARED, treadmill, cycle) the crew uses and watch each skeletal site respond differently in 3D.

Space & Astronomy3DEasy60 FPS📱 Mobile-adapted⇄ 2D version

Microgravity bone loss is not one number — it is five or six different rates happening at once, one per skeletal site, each responding to a different mix of exercise devices. This 3D simulator places bone-density markers at the femoral neck, lumbar spine, tibia, calcaneus and forearm on a floating astronaut figure, and shrinks and recolors each marker independently as its own site-specific loss accumulates over a simulated mission — driven by exactly which combination of ARED resistance training, treadmill running and cycle ergometer work the crew actually performs each day. Toggle devices on and off to see why the real ISS exercise protocol pairs a resistance device with an impact-bearing cardio device rather than relying on either alone.

⚙ Under the hood

Observe five key skeletal sites on a floating astronaut figure, where markers shrink and change color to reflect real-world loss rates.

space medicineastronaut healthmicrogravity effects

3D · Three.js / WebGL renderer · 60 FPS target · runs fully client-side, no install