Underpronators tend to bear more weight during push-off on their outside toes and their pinky toe. Underpronators usually have high arches, and they can have tightened Achilles tendons which can result in overuse injuries, such as:

 

• Achilles tendinitis
• Plantar fasciitis
• Heel spurs
• Instability
• Iliotibial band syndrome. This is the inflammation of the IT band, the ligament running down the outside of the thigh that connects the hip to the shin. The IT band helps to stabilize the knee.

 

SIGNS AND SYMPTOMS OF UNDERPRONATION

Many of the signs of underpronation are similar to those of overpronation, including:

 

• Arch or heel pain.
• Pain that migrates from the feet upward, affecting the knees and lower back.
• Pain manifests after a long period of standing, walking, or running.
• Swelling in the mid-foot, the side of the foot, the heel, the ankle, and even toes.
• Stiffness and loss of range of motion in the feet.