WHAT SOCCER BALLS SHOULD BE USED FOR PRACTICE IN A GYMNASIUM?
There are some specifically designed indoor balls which are size 4, made of leather (or synthetic leather) which have a low bounce. They are excellent, but not readily available (you would need to do a search on the internet). The balls made for indoor with a fuzzy (tennis ball) type cover on them are shocking (but the school or the Parks & Rec may not let you use anything else unlucky players) As most gymnasiums have a wood or composition floor and if you are using your regular soccer balls, take some air out to reduce the bounce.
