Tips on how to close the Captains of Crush grippers

In this video I show you two major tips on how to close the Captains of Crush grippers. The #Coc gripper are a standard worldwide for testing and improving the grip strength. There are 11 types corresponding to different forces required for closing them. There is even a certification program for closing the no 3, 3.5, 4 for men and 2, 2.5 for women. #CaptainsOfCrush #gripper #strength #flexor