The peroneal (Or fibularis) tendons run along the outside of your lower leg and cross behind the ankle bone to attach to the foot; their job is to turn the foot outward and help stabilize the ankle. A strain happens when these tendons or their muscle fibers are overstretched or torn — often from an inward-rolling (inversion) ankle injury, or simply from repetitive load on sloped surfaces or worn-out shoes.
Recognizing it
Typical signs are pain along the outer ankle and lower leg, sometimes with a pop or snap at the moment of injury, and swelling that settles over the tendon path rather than the whole ankle. A clinician will usually test the tendons directly by moving the foot against resistance, and may order an X-ray to rule out a bone injury nearby.
Early management
As with most soft-tissue strains, the first few days focus on calming the area down: ice for 20–30 minutes at a time, elevating the foot, a compression wrap, and often a lace-up brace or stirrup splint for support. Cross-training on a bike or in the pool is a good way to stay active without loading the injured tendons while they settle.
Rehab progression
Stage 1 — Gentle mobility
Start once you can rest your heel comfortably on the floor with your weight evenly spread on both legs. A towel stretch (looping a towel around the ball of the foot and easing it toward you for 30 seconds, 3 times) and a standing calf stretch against a wall are good starting points.
Stage 2 — Targeted strength
Resistance band work is the core of peroneal rehab, since these tendons need to be trained in the exact directions they control: pulling the foot upward against band resistance, and turning it outward (eversion) against band resistance, each for 3 sets of 10. Toe raises — rocking back onto your heels until your toes lift — round out this stage.
Stage 3 — Balance and return to activity
Single-leg balance work (eyes open, then closed) rebuilds the reflexive control that protects the tendons during quick direction changes. Once that feels solid and pain-free, reintroduce impact gradually — jogging, then jumping rope landing on both feet, then on the injured leg alone.
Are you ready to return to sport?
Compare the injured leg to the uninjured one. You’re generally ready to progress toward full sport when you have full range of motion and strength on both sides, can jog and sprint straight ahead without pain or limping, and can perform cutting and figure-eight drills at increasing speed without discomfort.
Lowering your risk going forward
Since peroneal strains are often linked to ankle instability, keeping your ankle and peroneal muscles strong long-term matters more than most people expect. Supportive, high-top or stable athletic shoes, a proper warm-up, and avoiding uneven or sloped running surfaces when possible all help reduce recurrence.
Peroneal tendon rehabilitation exercices
This page is educational and general in nature. If pain is severe, you can’t bear weight, or symptoms aren’t improving as expected, see a qualified clinician — see our medical disclaimer.