bouncing gym ball

[confuzed 88]

when can I start bouncing on it? I'm rocking on it at the moment, but just wanted to know when can I start bouncing n what will it achieve lol
I read ages ago it was good to b on a ball lol

 

[KellyHook]

im already bouncing on mine, have been for the past 2 weeks, im just using it at the moment to help my SPD...