When I was practicing beach and water starts my left forearm got sore, but kept on practicing until I got them down, then I was left with a sore left forearm for over a year, creatine monohydrate finally got rid of the soreness, but thought about doing exercises for my grip. Local fitness club does not have anything for grip strengthening, so bought a flexor grip strengthener (top, Captain of Crush #1, I added leather covers) and what I found from reading the manual is that it is important to also strengthen the extensor muscles in the hand using a rubber band (bottom). When I started using the rubber band to do extensor exercises (bottom), after the flexor exercises (top), I could feel a little pain in my right forearm. So the hand extensor muscles were out of balance with the flexor muscles and that was part of my problem. The CoC #1 is designed for low reps, 3 x 10, they make another line for high reps called Zenith with smooth contoured handles, but the manual said low reps at high strain are better for building strength than high reps at low strain, so the Zenith are designed for warming up for the CoC, I am not that into it so sticking with the CoC but may use a tennis ball or something to warm first as recommended.
