You can use the SwingStrength™ feature while practicing or during a round. You can use it when practicing at the driving range to improve consistency for your normal, full swing. You can also use this feature when you are trying to use a less-than-full swing. For example, you can swing your 9-iron at 50% and see how that affects the distance. During a round, when you need that distance, you can turn on the SwingStrength feature and take a couple practice swings at 50% before hitting your shot.