The techniques utilized in mixed martial arts competition generally fall into two categories: striking techniques (such as kicks, knees and punches) and grappling techniques (such as clinch holds, pinning holds, submission holds, sweeps, takedowns and throws). As mixed martial arts has no international sanctioning body, rules may vary between promotions. While the legality of some techniques (such as elbow strikes, headbutts and spinal locks) may vary, there is a near universal ban on techniques such as biting, strikes to the groin, eye-gouging, fish-hooking and small joint manipulation.
Today, mixed martial artists must cross-train in a variety of styles to counter their opponent's strengths and remain effective in all the phases of combat. For instance, a stand-up fighter will have little opportunity to use their skills against a submission artist who has also trained take downs. Many traditional disciplines remain popular as a way for a fighter to improve aspects of their game.