The three peroneal muscles known collectively as the Peroneals serve to turn the foot out (evert) and push the foot down (plantarflex). The tendons run behind the ankle bone and connect the muscles to the bony structures of the foot and ankle. Whenever the peroneal muscles contract or are placed under stretch, tension is placed through the peroneal tendons. If this tension is excessive due to too much repetition or high force, damage to the peroneal tendons may occur. Peroneal tendonitis is a condition involving damage to one of the peroneal tendons with subsequent degeneration and inflammation of the affected tendon. Pain is typically seen around the back and outer side of the foot.
