The 30" can be used for wider two leg stances with either an extra inflated DynaDisc or the DynaDiscPLUS.
It can also be used in a sitting position thereby increasing the demand in stabilizing and coordinating the center of the body.
In a seated position you can rotate the board along its edge both clockwise and counter-clockwise and rock the board symmetrically to the left and right, forward and backwards, and on diagonals.
