A balance disk is a hard cushion.
Balance disc can be used in fitness training as the base for core, balance, and stretching exercises. You can use it as a seat cushion for active sitting, similar to using an exercise ball as a chair.
There is no resistance when using this product.
(Least Difficult Stability To Most Difficult Stability) Floor > Balance Beam > Half Foam Roll > Foam Pad > Balance Disc > Wobble Board > BOSU Ball