If you’ve ever trained for a marathon, a triathlon or worked out extra hard at the gym, you know that muscle fatigue and soreness feeling. Those sore muscles are often felt to be a reward after a hard workout. We’ve all probably experienced sore muscles at one time or another. Muscle soreness associated with exercise is known as delayed onset muscle soreness or DOMS making it difficult to walk, reduce your strength or make your life uncomfortable for a few days. DOMS occurs for days after exercise due to swelling in the muscle compartment. The body’s natural defense against the swelling is a surge of white blood cells, prostaglandins, and other nutrients and fluids that flow to the muscles to repair the damage after a tough workout. The reason muscle soreness is worse several days after a workout is because the swelling and inflammation can build up for days after a workout. In order to continue to train, you must properly recover because this is just as important as the workout itself.