https://scholars.uky.edu/es/publications/stability-balls-and-students-with-attention-and-hyperactivity-con/
Stability balls and students with attention and hyperactivity concerns: Implications for on-task...
stability balls
https://pure.psu.edu/en/publications/a-pilot-evaluation-of-the-effects-of-exercise-stability-balls-on-/
A pilot evaluation of the effects of exercise stability balls on BMI in the educational setting -...