Taping the MCL (medial collateral ligament) adds stability to the inner side of your knee by limiting the sideways force that stresses the ligament. It’s a common technique for returning to activity after a mild MCL sprain or for preventing re-injury during sports. The process involves anchoring strips of athletic tape above and below the knee, then applying support strips that reinforce the inner knee against that inward-buckling motion. Below is a complete guide to doing it correctly.
What the MCL Does and Why Taping Helps
The MCL is a flat band of connective tissue running from the inner side of the thighbone down to the inner side of the shinbone. Its job is to resist valgus force, which is the force that pushes the knee inward. Think of the motion your knee makes if you plant your foot and get hit from the outside: the MCL is what keeps the inner side of the joint from opening up.
Taping mimics this function by creating an external reinforcement along the same path. It won’t replace a fully torn ligament, but for mild sprains (where the ligament is stretched but intact) it provides enough support to reduce pain and prevent the knee from drifting into that vulnerable position during movement. More severe injuries, where the knee feels loose or unstable even when standing, typically need a hinged brace or medical evaluation rather than tape alone.
Supplies You’ll Need
- Rigid athletic tape (38mm / 1.5 inches wide): This is the standard white zinc oxide tape used in sports medicine. It doesn’t stretch, which is exactly what you want for structural support.
- Pre-wrap (foam underwrap): A thin foam layer that goes on the skin first to protect against blisters and irritation from the adhesive.
- Pre-tape adhesive spray (optional but helpful): Creates a tacky surface so the tape holds during sweating and movement. Hold the can 6 to 8 inches from the skin and spray evenly. Let it dry until it feels tacky, not wet.
- Scissors: Tearing rigid tape works in a pinch, but clean cuts make smoother edges that are less likely to peel up.
Preparing the Skin
Clean the area around your knee thoroughly to remove sweat, dirt, and skin oils. If you have significant hair on the area, shaving it will dramatically improve how well the tape sticks and make removal far less painful. If you prefer not to shave, pre-wrap becomes essential.
If you’re using adhesive spray, apply it now and wait a few seconds for it to become tacky. If you have sensitive skin, test the spray on a small patch first. Hypoallergenic options exist for people prone to reactions. Once the spray is tacky, wrap pre-wrap around the leg in two zones: one ring around the lower thigh (about 4 to 5 inches above the kneecap) and one ring around the upper shin (about 4 to 5 inches below the kneecap). These will be your anchor points.
Step-by-Step Taping Technique
Set Your Knee Position
Bend your knee to about 20 to 30 degrees. This is roughly the angle your knee takes when you’re sitting on the edge of a table with your legs hanging. A slight bend keeps the ligament at a functional length and prevents the tape job from being too tight when you move. Do not tape with the knee fully straight, as flexing afterward will pull the tape loose or create painful pressure behind the knee.
Apply the Anchor Strips
Wrap one strip of rigid tape around the lower thigh over the pre-wrap, forming a complete ring. This is your upper anchor. Wrap a second strip around the upper shin over the pre-wrap for your lower anchor. Keep these firm but not tight. You should be able to slide a finger underneath comfortably.
Apply the Support Strips
This is the part that actually stabilizes the MCL. Starting at the upper anchor on the outer side of the thigh, run a strip of tape diagonally across the inner knee and down to the lower anchor on the inner shin. The tape should cross directly over the MCL, which runs along the inner joint line of the knee. The direction of pull is from outside-upper to inside-lower, creating a force that resists the knee from buckling inward.
Apply a second support strip starting from the inner side of the lower anchor, running diagonally upward across the inner knee, and attaching to the upper anchor on the outer thigh. This strip forms an “X” with the first one, with the crossing point sitting right over the MCL. The X-pattern distributes force in two directions and provides much better support than a single strip.
For additional reinforcement, repeat both diagonal strips one more time, overlapping the originals by about half the tape width. Three to four support strips total (two in each direction) is standard for most MCL taping jobs.
Lock It Down
Finish by applying one more circumferential strip around the upper anchor and one around the lower anchor, covering the ends of all the support strips. This prevents them from peeling up during activity. Some people add a short vertical strip running straight down the inner knee from upper anchor to lower anchor, sitting directly on top of the X, for extra medial reinforcement.
Kinesiology Tape as an Alternative
If you’re looking for lighter support or find rigid tape too restrictive, kinesiology tape (the stretchy, colorful tape) is another option. It won’t limit motion as firmly as rigid tape, but it can reduce pain and provide feedback that helps you avoid risky positions. Most kinesiology tape can be worn for 3 to 5 days, compared to rigid tape which should come off after each training session or game.
For an MCL application with kinesiology tape, cut one strip long enough to span from mid-thigh to mid-shin. Anchor the center of the strip over the inner knee joint with no stretch, then apply the upper and lower tails with moderate stretch (roughly 50% of the tape’s maximum). Add a second strip in an X pattern if needed. The elastic tension gently pulls the tissue toward the midline, offering a mild stabilizing effect.
How Long to Wear It
Rigid athletic tape is a single-session tool. Apply it before activity and remove it afterward. The adhesive weakens with sweat and movement, and leaving rigid tape on for extended periods increases the risk of skin breakdown, especially over bony areas like the inner knee. Kinesiology tape is designed for multi-day wear, typically 3 to 5 days, and holds up through showering.
When removing rigid tape, peel it slowly in the direction of hair growth. Pulling quickly or against the grain tears skin, particularly if you skipped pre-wrap. Adhesive remover wipes can help dissolve stubborn residue.
Warning Signs to Watch For
Tape that’s too tight can restrict blood flow, and in rare cases, constrictive bandaging can contribute to compartment syndrome. Watch for these signals after taping:
- Tingling or burning sensations in the lower leg or foot
- The calf feeling unusually tight or full, beyond normal muscle tension
- Pain that seems disproportionate to the injury, especially pain that worsens when you flex your foot or stretch your calf
- Numbness in the foot or toes, which is a late and serious sign
If any of these appear, remove the tape immediately. The fix is simple: reapply with less tension on the anchor strips. You want the tape to guide and limit movement, not compress the leg. A properly applied tape job should feel supportive without any sense of constriction when you’re standing, walking, or bending the knee through its normal range.