Chinese martial artists also compete in non-Chinese or mixed combat sports, including boxing, kickboxing and mixed martial arts. Sanda is practiced in tournaments and is normally held alongside taolu events in wushu competition. For safety reasons, some techniques from the self-defense form such as elbow strikes, chokes, and joint locks, are not allowed during tournaments. Competitors can win by knockout or points which are earned by landing strikes to the body or head, throwing an opponent, or when competition is held on a raised lei tai platform, pushing them off the platform. Fighters are only allowed to clinch for a few seconds. If the clinch is not broken by the fighters, and if neither succeeds in throwing his opponent within the time limit, the referee will break the clinch. In the U.S., competitions are held either in boxing rings or on the raised lei tai platform. Amateur fighters wear protective gear.