A good arm-swing technique will help build momentum, direction, and distance out of the box.
There are three phases to the cycle:
First three steps—Big arm swings: The arm motion should be from the chin (with the hand) to the pocket (with the hand).
After initial steps, Fast Arms: Build momentum, still focusing on the direction.
Striking the Bag, Beat the Drum: Remember to look over the right shoulder, and then the left after striking the bag. Note: Most coaches only teach runners to look over the right shoulder (for errant throws/past balls). Teaching to look over the left shoulder will help simulate game-like situations—where runners are on base ahead of them.
Coaches Tip: Start from a fixed position, and don’t focus on the lower half—the arm swings are the main part of this drill.