Brazilian jiu-jitsu in the context of "Necklock"

A combat sport, or fighting sport, is a contact sport that usually involves one-on-one combat. In many combat sports, a contestant wins by scoring more points than the opponent, submitting the opponent with a hold, disabling the opponent (knockout, KO), or attacking the opponent in a specific or designated technique. Combat sports share a long history with the martial arts.

Some combat sports (and their national origin) include boxing (Greek-British), Brazilian jiu-jitsu (Japanese-Brazilian), catch wrestling (British-American), jujutsu (Japanese), judo (Japanese), freestyle wrestling (British-American), Greco-Roman wrestling (French), karate (Chinese-Okinawan-Japanese), kickboxing (numerous origins, mainly Southeast Asian), Lethwei (Burmese), mixed martial arts (numerous origins), Muay Thai (Thai), sambo (Soviet/Russian), sanda (Chinese), savate (French), taekwondo (Korean), Vale Tudo (Brazilian), pankration (Ancient Greek), luta livre (Brazilian), and folk wrestling (various).

Clinch fighting or trapping is the part of stand-up fighting where the combatants are grappling in a clinch, typically using clinch holds. Clinching the opponent can be used to eliminate the opponent's effective usage of some kicks, punches, and melee weapons. The clinch can also be used as a medium to switch from stand-up fighting to ground fighting by using takedowns, throws or sweeps.

Clinch fighting is emphasized in both striking martial arts, such as Kun Khmer, Muay Thai, Lethwei, Boxing, and Sanda, as well as grappling martial arts, such as Wrestling, Judo, Sumo, Sambo and Brazilian Jiu-Jitsu.

Submission wrestling, also known as submission fighting and submission grappling or simply grappling, is a martial art and combat sport that focuses on ground fighting and submission techniques. It is a hybrid discipline that incorporates elements of various martial arts such as various wrestling styles, judo, and Brazilian jiu-jitsu. Submission wrestling is practiced both as a competitive sport and as a training method for self-defence and mixed martial arts (MMA).

Jujutsu (Japanese: 柔術 jūjutsu, Japanese pronunciation: [dʑɯːʑɯtsɯ] or [dʑɯꜜːʑɯtsɯ] ), also known as Japanese jiu-jitsu and simply jiu-jitsu or ju-jitsu (both /dʒuːˈdʒɪtsuː/ joo-JITS-oo), is a Japanese martial art and a system of close combat that can be used in a defensive or offensive manner to kill or subdue one or more weaponless or armed and armored opponents. A subset of techniques from certain styles of jujutsu were used to develop many modern martial arts and combat sports, such as judo, aikido, sambo, Brazilian jiu-jitsu, ARB, and mixed martial arts.

Kickboxing is a full-contact hybrid martial art and boxing type based on punching and kicking. Kickboxing originated in the 1950s. The fight takes place in a boxing ring, normally with boxing gloves, mouth guards, shorts, and bare feet to favor the use of kicks. Kickboxing is practiced for self-defense, general fitness, or for competition. Some styles of kickboxing include: full contact karate, Muay Thai, Japanese kickboxing, Lethwei, Sanda, and Savate.

Although since the dawn of humanity people have faced each other in hand-to-hand combat, the first documentation on the use of kicking and punching in sports combat is from ancient Greece and ancient India. But nevertheless, the term kickboxing originated in Japan, in the 1960s, and developed in the late 1950s from karate mixed with boxing, having some influence, with competitions held since then. American kickboxing originated in the 1970s and was brought to prominence in September 1974, when the Professional Karate Association (PKA) held the first World Championships. Historically, kickboxing can be considered a hybrid martial art formed from the combination of elements of various traditional styles. This approach became increasingly popular since the 1970s, and since the 1990s, kickboxing has contributed to the emergence of mixed martial arts via further hybridization with ground fighting techniques from Brazilian jiu-jitsu, and folk wrestling.

Mixed martial arts (MMA) is a full-contact fighting sport based on striking and grappling, incorporating techniques from various combat sports from around the world.

In the early 20th century, various inter-stylistic contests took place throughout Japan and the countries of East Asia. At the same time, in Brazil there was a phenomenon called vale tudo, which became known for unrestricted fights between various styles such as judo, Brazilian jiu-jitsu, catch wrestling, luta livre, Muay Thai and capoeira. An early high-profile mixed bout was Kimura vs Gracie in 1951. In mid-20th-century Hong Kong, rooftop street fighting contests between different martial arts styles gave rise to Bruce Lee's hybrid martial arts style, Jeet Kune Do. Another precursor to modern MMA was the 1976 Ali vs. Inoki exhibition bout, fought between boxer Muhammad Ali and wrestler Antonio Inoki in Japan, where it later inspired the foundation of Shooto in 1985, Pancrase in 1993, and the Pride Fighting Championships in 1997.

Ground fighting (also called ground work or ground game) is hand-to-hand combat which takes place while the combatants are on the ground. The term is commonly used in mixed martial arts and other combat sports, as well as various forms of martial arts to designate the set of grappling techniques employed by a combatant that is on the ground. It is the main focus of Brazilian jiu-jitsu and is featured in varying amounts in catch wrestling, judo, jujutsu, sambo, shoot wrestling, hapkido, Dishuquan Dog Kung Fu, some schools of shuai jiao and other styles of wrestling.

Similarly to clinch fighting, ground fighting implies that the combatants are at a very close range, usually involving one or both combatants grappling the opponent using various grappling holds. Depending on the positioning of the combatants, the proximity can allow for techniques such as biting, chokeholds, fish-hooking, eye-gouging, joint locks, pressure point techniques, or various strikes.

Renato Sobral da Cunha (Brazilian Portuguese: [ʁeˈnatu soˈbɾaw]; born 7 September 1975), also known as "Babalu", is a retired Brazilian Luta Livre submission grappler, mixed martial artist, and was the former Strikeforce Light Heavyweight Champion. Sobral previously fought in the Ultimate Fighting Championship, where he posted a 6–4 record and has also competed for Bellator, RINGS, Jungle Fight, Cage Rage, Affliction, and ONE Championship. He is the Head Instructor of Babalu's Iron Gym Cerritos and has a Luta Livre black belt under Marco Ruas and also a Brazilian jiu-jitsu black belt under Carlos Gracie Jr.