Wrist curls are a great way to strengthen your forearm muscles. These muscles are used in many daily activities, including typing and holding heavy objects. Strengthening your forearms can help reduce arm fatigue, which can be a sign of overtraining or poor technique.lways practice proper form to prevent strain and injury, especially nerve-related injuries. If you feel pain in your wrist or forearm at any time during this movement, stop the exercise immediately. Aim to complete up to 15 wrist curls per arm, per set, working up to three sets of 15 reps.