This Is the New Fitness Tool You've Seen All Over Instagram

Simply put, the Theragun ($599) is a tool for muscle recovery. Almost like the most extreme massage chair you can imagine, you place the tip of the gun on your sore muscles and move it up and down until you feel the tightness worked out of you. It vibrates like crazy, eliminating the feeling of sore muscles in the process. You should apply it to each sore spot for a couple of minutes. Your body will know when it's best to stop, and the kit comes with a couple different sized balls that you can interchange based on what body part you're massaging.