Are they as effective as tradional ab excises? I heard just sitting on them and rocking your body a little bit is great for your stomach, that would be great ifs it true i get madden 03 going sitting on that, play a cd on the computer, download a few movies and get a nice ab workout while kicking ass in my franchise with the giants, thats a pretty dam productive hour if you ask me lol. When i have a big lead I play ball control and run the clock down and in that time i do sit ups lol.
Back to the ball where can i get one and how much they run for? Aslo how big are they suppose to be, im 5'10 175 so what would be the right size for me. Do they come with a book showing all the different excises i can do with the ball?
Thanks for the help?