How to maximally stress the MCL
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Here @eddie_wolverine demonstrates a mean sideways kneebar variation. Unlike a classic kneebar this leg lock isolates the knee ligament, medial collateral ligament. In addition to isolating the ligament there is not additional support from the bony articulation because the knee is slightly bent. This joint lock looks very similar to an orthopedic test used to assess for the integrity of the medial collateral ligament, the valgus stress test.
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Steps to maximize the breaking force on this leg lock variation.
1️⃣ Slight bend in the knee to unlock the bony articulation of the femur and tibia.
2️⃣Externally rotate the tibia to put the MCL on stretch.
3️⃣Impart a valgus force to maximally stress the ligament. .
I would recommend caution when applying this leg lock variation to give your opponent ample time to tap before their knee ligament is ruptured.