Side Knee Pain

RapidForce Muscle-Support Shape - U Shape

RapidForce® Shapes stabilize and support the muscles, tendons, and ligaments in the side of the knee. The U Shape is designed to reduce swelling by gently lifting the skin above the pain point, which can help circulate blood, oxygen, fluids, and nutrients to an injury site.

Knee pain is one of the most common ailments in athletes because the knees support the weight of the upper body, and the pressure on them is especially intense during high-impact sports movements, such as bending, twisting, turning, squatting and running.

Young athletes (especially volleyball players), runners, skiers, bicyclists, climbers, and soccer or football players are particularly susceptible to side knee injuries and knee pain.
The pain can be described as weakness, tightness, burning, a dull but persistent ache, or pain that begins in the bottom or side and radiates across the kneecap. There may also be swelling or a buckling or locking feeling.
Pain in the side of the knee can be located in either the outside (lateral) or inside (medial) of the leg. Most side knee pain is caused by inflammation from a relatively minor sprain or strain, but it may also be the result of a tendon disconnecting from the kneecap or wear and tear of the knee’s cartilage. It’s also common for side knee pain to occur in people whose kneecaps have been pushed outward due to overuse during athletic activities.
RapidForce® U Shapes are designed to reduce pain in the side of the knee, and they’re particularly effective for youths and volleyball players because they can hold the kneecap in its proper position while training or competing. The Shape’s central core adheres to the side of the knee, along the outer edge of the kneecap. The central core stabilizes the injury site, and the dual arms are stretched laterally, creating structural support. The U Shape is also designed to provide some mechanical lift, which literally lifts the upper layers of skin so blood, oxygen, nutrients, and fluids can flow to the injury site more efficiently.
RapidForce® Shapes are unlike any other pain-relief product on the market today. Each Shape’s patented design was carefully developed and perfected by a team of physical therapists, athletic trainers, engineers, and an ultrasound technician who sought to create a product that supports the muscles and helps relieve pain caused by muscle, tendon, joint, and ligament injuries. RapidForce® Shapes are used by athletes at all levels, including professional athletes, semi-pro athletes, and people who lead or want to lead an active lifestyle.

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.

RapidForce Shapes for Side Knee Pain

U Shape

From $9.95

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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 daily wear or moderate-to-light athletics, a moderate stretch of 3/4” is ideal. 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. Locate the pain in the outer edge of the kneecap

    1. Locate the pain in the outer edge of the kneecap

  2. 1. Locate the pain in the outer edge of the kneecap

    2. Apply the center of the U Shape

    Peel off the backing of the center of the U Shape and place along the outer edge of the kneecap. Press to secure the bond.

  3. 1. Locate the pain in the outer edge of the kneecap

    3. Apply the lower arm - 3/4" Stretch

    Peel off the middle backing of the lower arm of the U Shape, leaving the end tab in place. With the knee slightly bent and while stabilizing the center with one hand, customize stretch based on intensity of activity and place the lower arm of the U Shape in an inward direction. Keep the Shape one finger’s width from the kneecap for optimal performance. Smooth the fabric onto the skin, moving from the center of the Shape outwards. Remove the backing from the end tab and place on the skin. Do not stretch this small piece. Press over the entire arm of the U Shape for about 10 seconds to secure the bond.

  4. 1. Locate the pain in the outer edge of the kneecap

    4. Apply the upper arm - 3/4" Stretch

    Apply the upper arm of the U Shape in the same fashion as described in step 3, in the opposite direction.

  5. 1. Locate the pain in the outer edge of the kneecap

    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.