But getting into the best shape possible and staying in condition makes casting easier and more enjoyable. To build up hand strength, try squeezing a slightly deflated tennis ball or one of the new hand-strengthening gel balls. This squeezing action is also good for your forearm. The best exercise aid that I have discovered for flycasting is a product called the Eggsercizer. Advertised as the world's smallest exercise machine, this resistive hand exerciser is shaped like an egg and fits perfectly into your hand.
People use the device for stress reduction, sports strength training, arthritis and injury recovery.
Just by squeezing the resilient polymer, a flycaster strengthens fingers, hand, wrist, forearm and elbow. It comes in three densities from soft to firm for different tensioning. I use the egg to strengthen my casting hand and fingers. You do the same thing by holding the exerciser in your palm with the narrow end pointed up toward the thumb. While squeezing with your last three fingers, push the tip of the egg with your thumb.