Description : Is it good for a 10-year-old boy to jump 5 hours a day on a big rubber ball while teaching at school? It is said that the doctor recommended it.
Last Answer : It's definitely not about jumping. Sitting on the ball strengthens the abdominal muscles, small muscles around the spine, the correct position of the spine, strengthening the muscles of the lower limbs, ... the hips. With intense jumping, the child must be more careful, certainly not for so long.