Foam rollers have become a staple in many physical therapy clinics and gyms. If you have never seen one before, it is a 3 ft x 6-inch foam cylinder that can be used for stretching and massaging muscles during the recovery process as well as pre and post-workout. While it is a simple looking tool, there are many ways to use it. Many people swear by the benefits of foam rolling stating that it helps them feel more limber and reduce pain. These claims certainly sound good, but what does rolling out your muscles actually do and could it be a beneficial tool for you?