Hanging is a staple in calisthenics. From pull ups, leg raises and even levers require a lot of hanging ability.
Unfortunately, we don’t hang from trees or ledges as our primal genetics are designed to do so our hanging muscles are weak. Not only do we have a weak grip, but the muscles that transition tension from the arm to the torso are often very deconditioned. This weakness can undermine every hanging exercise you do by compromising stability and control.
That’s why I recommend this simple exercise to build up those weak links. It will make a massive difference in every hanging exercise you need to do.