The wedge shape of this seat cushion puts the spine in an upright position and can therefore strengthen the back muscles. The tongue on the front can also train the inner muscles of the legs. The seat hardness of the mobile cushion can be regulated using a valve using a standard ball needle. This is particularly important for gymnastic exercises. Each mobile cushion comes with a brochure with varied exercise suggestions to strengthen the back, stomach, buttocks and shoulder muscles as well as to promote balance and coordination. After the auction, you will automatically receive an email to your email address stored on eBay to initiate the purchase process. During the checkout process, you can combine several of our auctions and save shipping costs, adjust your billing and delivery address.
