What is peroneal tendonitis?
Peroneal tendonitis is an inflammatory condition of the peroneal tendon, which runs along the outside of the lower leg, behind the ankle and under the foot. This condition is commonly seen in runners as an “overuse” condition. The Peroneal Muscles originate On the outer (lateral) side of the lower leg just below the head of the fibula (smaller, outer bone of the lower leg). Pass under the outer ankle bone (lateral malleolus) over the side of the foot bone (cuboid) under the foot and attach to the base of the big toe. The peroneal tendon is encased in, or surrounded by, a synovial sheath that secretes fluid. This fluid allows the tendon to slide up and down without friction as the foot pronates and supinates (moves outward and inward). How does peroneal tendonitis occur? Excessive pronation of the foot places stress on the peroneal tendon by causing the tendon to have to work to hard to provide foot stability. Foot stability occurs when the mid foot is “locked up” during the push-off ph
