Through the winter when I'm not shooting much (if at all) I now do forearm exercises that isolate the same forearm muscles we use to (subconsciously) return the gun to the target after we shoot. Years ago, when I did not do these exercises, I would have great difficulty getting into my shooting rhythm in the spring, and oftentimes would have muscle fatigue in my forearms after shooting. Once I'm in the groove of shooting 2-4 times a week the muscle fatigue goes away. Yes, I agree, your grip, stance, and weight balance on your feet are all important, however some of us do not have as much muscle as others and we need a little extra training.
P.S. In my experience the grip muscles in your forearm that are used to counter recoil are not improved by using a hand squeezer.