This is a general physical-activity game, not a medical measurement, treatment, or rehabilitation prescription. Use a stable chair and stop if you feel unwell.
How to play
Sit in a stable chair without wheels and keep both feet near the floor. Choose private camera tracking, or use the large touch buttons and Left/Right arrow keys. Lift or tap the prompted side, then return to the other side. Five pace settings range from very slow 1/8× to 2×.
Safety and privacy
Clear the floor around you and keep a support person nearby when appropriate. Stop immediately for pain, dizziness, shortness of breath, loss of balance, or unusual fatigue. Camera images are processed locally in the browser and are not uploaded by the game.
This game records only game steps, timing, score, input mode, and session completion. These values are not clinical measures and do not demonstrate treatment or rehabilitation benefit.