I have back problems and have a hard time doing stomach crunches on the floor. My daughter has one, so I tried my exericises on the ball and I was pleasantly surprised that there was no pain involved. Now I do them all the time and hope that all my hard work pays off.

I ordered the large sized ball and it is excellent quality. I wish that it had a texture vs. slick because when I get sweaty, it turns slippery. I love that it can hold a lot of weight and is a perfect size for my height.

I love working with a yoga ball. Especially for sit ups and other ab work. This ball took forever to inflate and I got a full arm workout with the pump in doing so, but so far I like it a lot.

i was very excited to get this product. when it got here we opened it right away and started to pump. we got it to the full point and stuck in the plug and it started to deflate. we thought it was something we did and tried again. still the air started coming out!! i told my hubby he was doing something wrong and this time i tried and still it deflated. i looked closely at the plug we were putting in to hold the air and it was damaged. there was a hole in it!! so i packaged it back up and looked for the return label but there was none. i called hsn and they said i would have to return it to the manufacturer but did say they would send me a postage paid label so i wouldn't have to shell out any money for a defective product. i waited about 2 or 3 weeks for the label to get here and sent it out the other day. still love hsn and have bought A LOT of things from them over the years and only had to return a few :-)

I like this ball. The pump is cheaply made. The aluminum tip broke. Used the plastic one to inflate. It should have a dvd or intructional chart for the price. I should have shopped around.