If you play a sport you will benefit from training your hands. Getting the hands strong in all the various grips; power, hook, ball, pinch, precision, finger abduction, adduction and extension leads to tremendous hand and upper body power. Studies have shown, "Four Weeks of finger grip training increases the rate of force development and the maximal force in elite and world-top ranking climbers.", meaning hand and finger training will change performance.
Matt Jennings, the Head Strength and Conditioning Coach at Xavier University, understands that changing the rate of force development in a basketball players fingers can mean who retains the ball in a highly contested contest and even change the outcome of a game. His athletes train the various grips selecting particular training devices from their Pendulum Grip Cart. They also use the Pendulum Gripper to maximize their power, measure results and Get Strong.