Forearm & Wrist Training: Fitarc Forearm Rotation Trainer targets key forearm muscles through pronation and supination exercises. Boost muscle growth, improve wrist flexibility, and sculpt defined forearm linesall with one compact tool designed for precision training. Resistance Band Included: Fitarc forearm trainer comes with a resistance band. Simply step on the band and adjust the intensity by changing the position of your foot. As you rotate the handle, the resistance builds up gradually, helping you improve forearm strength, grip endurance, and rotational control.