Physical flexibility is a crucial part of maintaining a healthy body. If your muscles are not nimble your body will not work properly, in or out of the gym. As WSJ reports, according to Dr. Jay Hertel, professor of sports medicine at the University of Virginia, stretching is a key way to maximize your joints’ full range of motion. And “from an injury-prevention standpoint, in theory you’ll also be better able to react in real-life situations, like when you’re about to fall or need to jump over something.” David Geier, the director of sports medicine at the Medical University of South Carolina, agrees in a Real Simple piece, explaining, “Flexibility is the third pillar of fitness, next to cardiovascular conditioning and strength training.” You’ll feel better, you’ll look better, and you’ll be better equipped to perform in your workout and in life. Here are 9 reasons to get on flexibility training right now.