In kickboxing, there are three different rule sets: 1. Full Contact Rules: You can only kick above the waist and can’t throw knees or kick at the legs 2. Glory Rules: You can kick above the waist, the legs, throw knees, and can clinch (lock your arms behind an opponent's head to hold them) for a single strike 3. Muay Thai Rules: Elbows are allowed and you can clinch your opponent for as long as you like until the referee breaks it up