Wave speed ball balance pad: strengthen the core muscles of human body by balancing the instability of the pad. Core muscle group is the most efficient and effective way to exercise "core muscle group" in our daily life, whether it is to lose weight or improve physical vitality. Wave speed ball: both sides can be trained, and the main feature is unstable surface training. Therefore, it is more difficult to stand, lie on your back, lie prone, kneel down and squat down after being combined with the wave velocity ball, which puts forward high requirements for core stability. For yoga practitioners, it is better to choose wave balls.