Quote:
Originally Posted by hippopotamus  If you want something convenient and cheap get one of those 24" diameter inflatable balls. They're 10 bucks at bargain shops around me. I do sit ups laying down on the ball and it works great. Been doing them that way for over 2 years now. |
is it really effective? because the way i see it, it's just the same as lying on the floor and doing the same exercises. educate me now.
