Are all the speed balls used in boxing inflatable?

Polyurethane sewing PU and thickening rubber elastic gasket,

The role of speed ball in boxing has the following feelings.

1, exercise your eyesight (good judgment of distance).

2, exercise boxing time (can not hit the ball early, can not catch the ball late).

3. Exercise the accuracy of hitting the ball (when you don't hit the center accurately, the ball will deviate and affect the continuous hitting).

4. Exercise muscle elasticity to improve fist defense (because it is such a rhythm, when you hit the ball, 1 is the front board and 2 is the back board. When you hit the ball once, it is 1, 2, 1. When you take back your forearm after punching, it is equivalent to the slow defense of closing the fist, and the ball will hit the board at 1.

5. Generally speaking, it is to improve the boxer's hand-eye coordination ability and determination to punch.

6. Coordination is necessary.