Knee Reaping vs. Knee Line Control

Knee reaping occurs when an athlete’s leg crosses their opponent’s hip line from the outside, forcing the knee inward in a twisting motion. This is illegal in many gi competitions due to the risk of ligament damage.

However, knee line control—a core concept of leg entanglements—is legal when performed without inward twisting. Understanding the difference helps athletes attack legs aggressively while avoiding accidental fouls.