I've used this as a seat for 2 years at work on and off to 'sort' out a posture/back problem - which is now 'sorted'. So, I guess it did the trick. The constant movement to balance yourself keeps your core working and also helps you to remember to 'sit up straight', etc. A good, big, blue, rubber ball...
I love this ball and would recommend it it highly. I've had it for close to 2 years and haven't had a single problem with it. The dvd worked and was very useful for a beginner like myself though it may not be as helpful for more experienced users.
This thing is great! It has sand or something in it so it doesn't roll too easily. It's also very strong and durable. We use it for working out and bounce on it while holding our toddler so he falls asleep. Great buy!
I've bought 2 of those and bin using them since last week
Regarding a previous comment about the diameter. This ball is hardly a 65cm ball. At 50-55cm you'll be wondering if your done pumping the ball since it looks pretty rigid at this point. Altough siting on it, it will be obivious (from a spectator point of view) that you need to pump it a little more... I've stopped pumping arround 61-62cm but i could have pump it all the way to 65cm ....seem rigid enought to me at this point
They've put sand in the ball (witch you would be able to remove if you want to), at first i was kind of finding this annoying, but after getting use to it, its pretty nice....it prevents the ball from moving arround, and since i'm using one of them as a chair, i find this a good idea.
I've received 2 cds, 2 balls, 2 cds, thats easy math. Altough one of them is defect (cyclic redundant). Well actualy, you can easely see on both cds reading layer that they have bin skratch....must have bin the entire production from what it looks like.....so you might not want to count on that....or bother asking them for an other cd...i guess
The pump that comes with it is pretty much only for the ball as i don't see it fit anywhere else even though they said you can use it to pump your bicylcle tire.... but it,s pretty nice though to get a pump with your ball and not having to search for one .... you get also 3 stopper for the ball
So overall, theres a couple of thing that they could improve other than the ball itself.... beside the fact that the ball could be made a little bigger It's a good ball, well made, anti-burst and the texture let you know that it's made from better material than the cheap 10$ ball So i'll give it a 4/5
** A week later, i can tell that the ball is a 65cm ball, probably the fact that for the first few days it did strech and i can pump it to 65cm diameter and have it perfect
The product arrived on time and in excellent condition. As always,I can count on Amazon for prompt delivery and customer service. I did not expect it to have some sand inside the ball. I did not notice it in the description. I did not use the DVD since I am taking exercise classes with theball.
In spite the sand inside the ball,the product is well made.