The pain is usually noticeable when exercise starts, then decreases or goes away as exercise continues. It is worse after exercise stops or the following morning. Both forms of shin splints can occur from doing too much exercise without appropriate rest. All properly designed exercise programs dictate a slow, progressive increase in volume and intensity over a long period of time. A sudden jump in volume, overloads your ability to heal during rest, and injury may result.
Exercise breaks the muscles down, and during rest they become stronger.
Ultimately, as more exercise is heaped onto damaged muscles, pain results. Often, every third or fourth week is very light to allow for recuperation and healing. Posterior shin splints Abnormal biomechanics can cause posterior shin splints. Overpronation of the foot during running tugs on the muscular attachment to the tibia, resulting in inflammation. Often these occur on both legs.