I use a grip as some type of warm up before throwing, or when Im bored. Like any sport, the body also needs to be conditioned, mainly the hands. This helps you get stronger throws and a good point someone brought up is that you should condition your non-dominant hand more if you are doing 2A. Does anyone else do anything similar?
Push ups switching from the palms to the back of the hand. Good for the wrist.
And 5 finger pushups good for the fingazz.