Originally Posted by Roffle Waffle
I did research, bough a ball and a base for it, and after 4 days said "fuck it, I come home tired after work, I deserve a little back support to lean on", and I can still slouch very easily on the damn ball
Just like every new workout or routine your body is not used to it. Try just using the workout ball for your seat for an hour your first week. Then gradually increase.