Mawashi-Hiza-Geri is the round knee of Karate. It gets its power from the rotation of the hip and foot and from the hardness of the knee. Knee strikes are banned in sport Kumite and often in full-contact Kumite (exception made for Kyokushinkai). However, it’s a great strike and it’s useful in close-distance self defense situations.
Traditional execution:
Kumite execution:
Where to use (✅ - Use; ❌ - Don’t use; 🟨 - Last resource):
Video examples: