Perfect your swing with Swing Metrics. Swing Metrics is a combination of Swing Tempo. Swing Training, and Swing Strength. Swing Tempo is the measurement of your backswing and downswing, expressing this is a ratio. Swing training utilizes the 3:1 ratio and provides you with audible tones that you can use to synchronize your swing mechanics and fine-tune swing tempo. Lastly, Swing Strength is the act of comparing how hard you can swing with your normal full swing.