Ball Catch

In a calm environment, floating balls appear around the patient and gradually move toward them. The patient must use their hands or the controller to strike the balls before they make contact with the body.

As the exercise progresses, the speed and size of the balls can be adjusted, and the number of balls approaching simultaneously increases. In more advanced levels, ball color also becomes important, requiring the patient to strike only balls of a specified color.

Catching is the body's dialogue with time: trajectory prediction, timing, and hand-eye coordination. Engaging both hands trains motor symmetry, while varied angles activate the visual field and trunk rotation.

1. Rebuilding reflexes and anticipatory movement after stroke and TBI
2. One-sided upper-limb weakness or frozen shoulder — targeting the weaker hand
3. Balance and movement confidence in older adults

Pick a level set and align the scene direction and height during preparation; then start the exercise. If the goal is strengthening the weaker hand, choose levels that require a specific hand.

1. Ball speed, launch arc and simultaneous ball count are configurable in the Level Designer.
2. Watch the left/right breakdown to monitor symmetry.
3. Recommended level duration is 90–150 seconds.

1. Catch rate (caught / total throws)
2. Response time and prediction quality
3. Left- vs right-hand performance breakdown
4. Survival time and total score