Forearm Grip Strength-

Hand-grip strength is very important in every aspect of grappling and is often overlooked. I have heard many students complain that their hands and fingers ache after first starting to train in Jiu-Jitsu. Many students at first do not have the forearm strength /grip strength to hold a good grip on a sleeve or a pant leg of kimono when they first start to train.
It is helpful for the forearm, wrist, hand, and fingers, to be flexed and stengthened, to ensure grip strength and prevent injury to these body parts. The objective of the exercises is to warm-up the joints before training. Better strength will also help in your submissions, positions, and escapes.