In fitness, the hand only plays the action of grasping, holding, pressing and holding, that is to say, assistance, which has not been seriously affected.

If you practice grip, red sand palm, black sand palm, etc. , will definitely make your hand deformation!

However, in fitness, the role of hands is very weak. What really works are muscle groups, abdominal muscles, chest muscles, adductor dorsi and deltoid muscles.

The deformability of the hand is affected by the frequency of direct use, not by heavy brute force, and generally does not change much!