Shin splints are a condition that is typically associated with exercise. It is characterized by pain along or just behind the shins. Pain occurs about two-thirds of the way down the leg below the knee, spans several inches, and tends to worsen with activity. This discomfort results from inflammation of the thin layer of tissue covering the tibia, as well as from the bone itself and two of the muscles that attach to it. Shin splints are common in people that begin training after a period of inactivity. Proper footwear while exercising can minimize the occurrence of shin splints.