Jokes aside having good grip and forearm strength improves everyday movement and activities. Hand Grips help build and develop strength in wrists and forearms. Traditionally they are used by boxers so they can handle stress on the wrists and forearms. This strength is utilized daily while lifting objects, driving, and playing sports like tennis or hockey.
Hold the gripper and try to close it as many times as you can. Record how long it took. Repeat on the other hand. Make sure to grip for the same amount of time on each hand.

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