Delayed onset muscle soreness is a term that’s thrown around by exercise specialists and magazines with the assumption that everyone knows what it is. In case you don’t, though, it’s the muscle soreness you feel after finishing a challenging workout. Typically, the soreness peaks between 24 and 72 hours after completing exercise. While DOMS isn’t particularly pleasant, it’s a sign that you’re doing something right — stressing muscles to the point at which the body must repair them, helping them grow in preparation for further demands. Unlike with many injuries, you only feel DOMS when you move the affected area; at rest, your muscles may feel tired, but you shouldn’t experience much pain.