INJURIES: Kinematic mistake in vertical roundhouse kicking breaks ligaments

Muay thai, kickboxing, barefoot disciplines MMA should take care about very dangerous shortened roundhouse low kick without turning your heel can cause this ... After that kind of injury you will be forced to leave kicking disciplines. And where is science? Scientists? Teachers? Professours? Universities? Sport experts? No it seems that anybody can invent and promote anything. Remember traditional karate and gyako tsuki without turning right heel in a moment of punch? 3:30