What is peroneal tendonitis?

Peroneal Tendonitis is the inflammation of one or both of the peroneal tendons. These tendons stabilise the foot and prevent the ankle from spraining. They also allow you to turn your foot outwards. Both tendons are connected to the calf muscle – with one joining to the inner foot from the big toe, and the other to the outer foot from the little toe. They run down the back of the calf, past the outside of the ankle then split into two.


Peroneal Tendonitis is the inflammation of these tendons, causing pain around the back and outside of the foot.

What causes peroneal tendonitis?

The condition is caused by microtears in one of the peroneal tendons due to overuse, excessive exertion, or trauma. It’s a common occurrence among participants of sports that involve the repetitive movement of the ankle, such as running, and those with high arches or displaced heels (hindfoot varus).

The symptoms of peroneal tendonitis include pain around the ankle and ankle, swelling, and heat emanating from the affected area.

Several factors contribute to the condition, including:

  • Unsupportive footwear
  • A sudden increase in high-impact exercises, such as running or jumping
  • Over-exercising
Causes of peroneal tendonitis

How to cure peroneal tendonitis

As with any inflammation, the key to successful treatment starts with RICE (Rest, Ice, Compression, and Elevation).

Alongside these simple steps, consider taking anti-inflammatory medication to relieve the pain. If the pain doesn’t subside for a long period, then cortisone injections may be considered as a potent method of reducing inflammation.

Once the initial inflammation has gone, sufferers of peroneal tendonitis are advised to undergo a structured program of flexibility and strength training. Stretching and reinforcing key muscles in the lower body will not only help recovery but will also decrease the probability of injury recurring.  

How do Enertor insoles help peroneal tendonitis?

Enertor’s insoles are specifically designed to decrease the impact felt on muscles and joints when moving – either during exercise or simply moving from A to B. They help to prevent peroneal tendonitis and recover from it.

The main benefits of Enertor’s Insoles are that they:

  • Decrease stress felt on feet when moving – reducing it by as much as 44%.
  • Improve the stability of feet by helping to correct foot alignment and gait.

Peroneal tendonitis insoles

Enertor Three Quarter Length Comfort insole

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Enertor Comfort Insole

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Enertor Comfort Heel Cup

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