, then they are unable to provide a solid foundation for the legs to work off. (This means a lack of stability, increased strain on the joints and muscles of the lower extremities, and a higher risk of injury.) The core also has an effect on the movement of the leg
movement patterns that allow the muscles of the legs and core to work together. You should perform the exercises below two or three times a week, either on a day that you are not running, or after you have run. The following exercise series is recommended
