My 8 year son has flat feet can he play badminton some time he say pain in foot he has three fracture in left and right foot and left foot also two years back doctor checked him and said that he has flat feet and also taken vitamin d test which is 12-13 we purchase arch support for him this is only for shoes playing time he use slipper what we purchase support for slipper in badminton ground sir do exercise and running then he say paining in his foot but he is very much interested in sport doctor said that we have to stop 1-2 month sports but badminton sir said that he will do only wall practising what we do pls help.