Posterior Tibialis Tendonitis

Final position of I Shape for PTT - wrapped around and up lower leg

RapidForce Shapes are uniquely designed to provide pain relief and dynamic mechanical support to the muscles, ligaments and tendons of the ankle and foot.

The posterior tibial tendon connects the lower leg to the ankle and foot. It is the anatomical part that allows athletes to walk, run, flex, and bend the foot and ankle, making it one of the most important in the body. Symptoms of tendonitis include muscle weakness, joint tightness, limited range of motion, instep pain, pain inside the foot that spreads into the leg, and even changes in foot shape. The pain area can be tender to the touch and can appear red, warm, or swollen. Posterior or anterior tibial tendonitis often has a gradual onset, getting progressively more painful over the course of a few days or weeks.

The RapidForce I Shape is designed to help reduce pain in the foot or ankle, especially pain caused by posterior tibialis tendonitis. The I Shape adheres to the skin on the outside of the foot, and is wrapped around the foot, creating dynamic structural support.

If you'd like assistance choosing the best RapidForce Shape for your needs, please email us at

Disclaimer: Please see your medical professional with any kind of pain. Pain could be an indication of a serious condition. RapidForce Shapes are not meant to replace professional medical advice, professional treatment, or a professional treatment plan.

The RapidForce Difference

  • STRONG - Thick multi-layered system that is 15x stronger than kinesiology tape
  • FLEXIBLE - Conforms and moves with your body any direction you go
  • LONG LASTING - Stays put for 3-5 days for 24-hour pain relief and support
  • SIMPLE - Easy-to-apply: simply peel, place, stretch, and secure

RapidForce Shapes for Posterior Tibialis Tendonitis Pain

I Shape

From $6.95

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Application Instructions

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Time it Right

While RapidForce Shapes can be applied at any time, they should be applied 1–2 hours before beginning strenuous physical activity. The Shapes can start working is as little as two hours, but some applications take up to four hours.

Prep Skin Thoroughly

Wash and dry the skin to remove oils, moisture, and dirt. Trim or shave body hair; this helps create a more secure bond and more comfortable removal. Apply the provided Skin Tac liquid adhesive wipe. Allow 30 seconds for it to dry.

Customize Stretch

Secure the Shape’s central core to the most painful spot. For optimal performance, stretch the arm a minimum of 1". Application instructions vary based on Shape, so read and follow the instructions mailed with your shape(s).

Secure Bond

With both the Shape and the skin at room temperature, carefully begin applying the shape. Once the shape is secure, rub it vigorously to maximize adhesive bond to skin.

  1. 1. Prop the foot or ankle

    1. Prop the foot or ankle

    Place the ankle at a 90 degree angle (from foot to lower leg) for the most effective application.

  2. 1. Prop the foot or ankle

    2. Anchor the end of I Shape

    Peel off one end of the shape’s backing. Orient the shape so it is approximately 45 degrees to the foot. Place the end tab over the outer heel. Press to secure the bond.

  3. 1. Prop the foot or ankle

    3. Apply remainder of I Shape - 1" Stretch

    Peel the backing from the largest area of the I Shape, leaving the opposite end tab in place. While stabilizing the end tab on the heel with one hand, stretch the shape’s arm, wrapping it beneath the foot and securing it on the outer portion of the lower leg. Smooth the fabric onto the skin, moving from the end tab upwards.

  4. 1. Prop the foot or ankle

    4. Secure and Bond

    Remove the backing from the end tab and secure to the skin. Do not stretch this small end piece. Press down on the entire I Shape for about 10 seconds to secure bond.

  5. 1. Prop the foot or ankle

    5. Feel Relief and Remove

    You may begin feeling relief within a few hours. However, it could take up to 24 hours. RapidForce shapes can provide pain relief and muscle support for up to five days but can be removed at any time. To remove, pull from the end of the arms to the center. If hair is present, pull in the direction of the hair’s growth to reduce discomfort. For easier removal, use mild warm water in the shower and then remove the shape slowly.