PERONEUS LONGUS

• Origin

Head and upper two-thirds of the lateral surface of the fibula

• Insertion

Medial cuneiform and the base of the first metatarsal bone of the foot

• Agonist(s)

- Peroneus brevis

- Peroneus tertius

• Antagonist(s)

- Tibialis posterior

- Flexor digitorum longus

• Function

Eversion of the foot (turning sole of foot outward), plantarflexion of the foot

TRIGGER POINT(S)

• Location

Trigger points can be found along the length of the muscle, particularly in the upper and middle portions

• Pain Referral Pattern

Pain may refer to the lateral lower leg, the ankle, and sometimes down to the foot.

It can cause aching, burning, or sharp pain along the outer calf and may contribute to discomfort or restricted movement in the ankle and foot.

• Potential Causes

▫ Overuse or repetitive activities involving foot eversion and plantar flexion, such as running, walking, or certain sports.

▫ Poor footwear or improper foot mechanics.

▫ Muscle imbalances between the peroneus longus and other lower leg muscles.

▫ Trauma or injury to the lateral leg or ankle.

▫ Prolonged standing or sedentary lifestyle.

• Prevention Tips

▫ Use proper techniques and form during activities involving foot eversion and plantar flexion to avoid overloading the peroneus longus.

▫ Incorporate regular stretching and strengthening exercises for the lower leg muscles.

▫ Ensure proper warm-up and cooldown routines before and after exercise.

▫ Maintain good posture and ergonomics during daily activities.

▫ Wear appropriate footwear that provides good support and fit to avoid muscle strain.

▫ Gradually increase activity intensity to avoid overuse injuries.