Liver Kick Set Up - Walk Down Muay Thai Combo
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Liver Kick·First Strike Athletics·Added by Admin
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Liver Kick
Genusリバーキック(Ribā Kikku)
TransliterationTranslation: liver kick
Overview
The Liver Kick targets the right side of the opponent's body at the level of the floating ribs, aiming to impact the liver — an organ highly sensitive to blunt trauma that, when struck cleanly, produces immediate incapacitating pain and involuntary collapse. [1] The liver sits beneath the right ribcage and is only partially protected by the lower ribs, making it vulnerable to powerful roundhouse kicks delivered with proper aim. [1],[2] A clean liver kick produces a delayed but unavoidable pain response that causes the legs to buckle and the body to fold, regardless of the recipient's toughness or willpower. [2],[3]
History & Origin
Targeting the liver with body kicks has been a known strategy in Muay Thai and kickboxing for decades, though the technique gained mainstream recognition through fighters like Bas Rutten, Mirko Cro Cop, and Giorgio Petrosyan. [1] In boxing, the liver punch has long been a fight-ending weapon, and kickers adapted the same anatomical targeting to their round kicks. [2],[3]
Effectiveness
The liver kick targets the liver on the right side of the body, just below the ribcage, and a clean impact produces immediate, involuntary collapse through vagal nerve stimulation and extreme pain that cannot be resisted or 'toughed out.' [1] It is considered one of the most effective fight-ending body strikes because even world-class fighters cannot continue after a clean liver shot. [1]
Lineage
The liver kick targets the right side of the body specifically over the liver; it has been a signature technique of fighters like Mirko Cro Cop and Bas Rutten. [1]
Competition Record
Bas Rutten used liver kicks to finish opponents in Pancrase and the UFC, and his body-kick expertise became his signature. [1] Mirko Cro Cop's left high kick was his most famous weapon, but his left body kick to the liver was equally effective in PRIDE FC. [1] Semmy Schilt used his reach advantage to deliver liver kicks in K-1 competition during his four Grand Prix championship victories (2005-2007, 2009). [2]
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Biomechanical Mechanism
Primary Action — Ballistic leg extension or rotation — the shin or foot impacts the target at high velocity
Joints Involved — Hip (flexion/rotation), knee (extension for front kicks, flexion-extension for roundhouse), ankle (stabilised)
Force Vector — Linear (front kick/teep — hip flexion and knee extension) or rotational (roundhouse — hip rotation with shin contact)
Kinetic Chain — Pivot foot rotation → hip turn → femur whip → shin contact — the leg acts as a heavy bat with the hip as the pivot
Position & Entry
From fighting stance (rear leg) — Pivot on the lead foot, swing the rear leg in a circular arc, strike with the shin, rotate the hips fully through the target
From fighting stance (lead leg) — Switch-step or throw directly, shorter arc but faster, used for speed and range management
As counter (after checking) — Check the opponent's kick, plant the foot and immediately return the roundhouse
Variants
Standard roundhouse (rear leg) — full hip rotation, shin strikes the target
Lead leg roundhouse (switch kick) — switch-step to generate power from the lead side
Low roundhouse (leg kick) — targeting the thigh to damage the opponent's base
Head kick — high roundhouse targeting the temple or jaw
Videos
1 video
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Ratings
Risk of injury to the person this technique is applied to
6
High6/10
Most common KO kick; generates ~1,000N force to head (Falco et al. 2009)
Skill level needed to execute this technique reliably
Intermediate
Whether this technique is allowed under major competition rule sets
Illegal
WBC/Boxing — All kicks prohibited in boxing {src— WBC Rules of Boxing}
Legal
— Unified MMA — Legal striking technique
Unified Rules of MMA, August 2025PDFKyokushin — Legal at full power to body and head {src— IKO Kyokushin Tournament Rules}
— WT — Legal, body kick 2 points, head kick 3 points, spinn...
WT Competition Rules 2024PDF— WAKO — Legal in Full Contact and Low Kick formats
WAKO Competition RulesPDFK-1/GLORY — Legal {src— K-1/GLORY Kickboxing Rules}
— IFMA — Legal — kicks are a core Muay Thai technique
IFMA Muay Thai RulesPDFTraining Notes
✓Target the right side of the opponent's torso just below the ribcage where the liver sits behind the floating ribs
✓The liver kick can end a fight regardless of the opponent's toughness — the liver produces an involuntary pain response that cannot be trained away
✓Set up the liver kick by attacking the head first: when the opponent raises their guard, the ribs open
✓Use the left roundhouse kick to the body (from orthodox stance) to access the liver on the opponent's right side
✓Drive the shin slightly upward into the target to compress the liver against the rib cage
✓Bas Rutten emphasised the liver kick as the great equaliser in combat sports, along with the liver punch
✓Timing matters more than raw power — a well-timed liver kick landing flush on an unguarded target is more effective than a power kick that hits the elbow
Common Mistakes
!Aiming too high and hitting the ribs or too low and hitting the hip — the liver window is specific and narrow
!Kicking without first moving the opponent's guard away from the body through head feints or punches
!Throwing the liver kick from too far away so only the foot connects — the shin must land for maximum impact
!Not following through and allowing the kick to slap rather than dig into the body
!Neglecting the left kick (from orthodox) when the liver is primarily accessible from the left side
!Dropping the guard during the kick — if the kick misses, you are exposed at mid-range
!Telegraphing by looking at the body before kicking — keep your eyes on the opponent's chin and use peripheral vision for targeting
Related Techniques
Counter Techniques
Setup Chain
1Stance and Range — verify correct distance for the kick to land at full extension
2Chamber the Leg — lift the knee to prepare the kicking trajectory
3Execute the Kick — extend the leg through the target with the appropriate striking surface
4Recover — retract the leg and return to fighting stance
Sources & References
Primary Source
Karate-Do Kyohan: The Master Text (Gichin Funakoshi, 1935)
1BookMuay Thai: The Art of Fighting (Kraitus, 2002)
Alias sources — [1] Muay Thai: The Art of Fighting (Kraitus & Kraitus, 1988) [2] Muay Thai Unleashed (Delp, 2006) [3] Championship Fighting (Dempsey, 1950)
2BookKarate-Do Kyohan (Funakoshi, 1935)
Effectiveness sources — [1] Muay Thai: The Art of Fighting (Kraitus & Kraitus, 1988)
3OtherJapanese Combat Sports Katakana Convention
Standard katakana transliteration of Western martial arts terminology (外来語) — used in Japanese MMA, boxing, and BJJ communities
4CitationMuay Thai: The Art of Fighting (Kraitus, 2002)
Alias sources — [1] Muay Thai: The Art of Fighting (Kraitus & Kraitus, 1988) [2] Muay Thai Unleashed (Delp, 2006) [3] Championship Fighting (Dempsey, 1950)
5CitationKarate-Do Kyohan (Funakoshi, 1935)
Effectiveness sources — [1] Muay Thai: The Art of Fighting (Kraitus & Kraitus, 1988)
Community
Athletics
Requires
hip flexibility, rotational hip power, balance on support leg
Favours
long legs for reach, flexible hips for high kicks
Key muscles
hip flexors, glutes, quadriceps, obliques, calves
Frequently Asked Questions
How do you set up a liver kick after your opponent throws a cross?
First Strike Athletics recommends walking your point down slightly after your opponent throws a cross in front of them, positioning your right foot to the outside rather than in front to avoid walking into a power shot.
What's a common mistake when faking a kick before the liver kick?
First Strike Athletics notes that when faking a left kick as setup, you should lift your knee higher and really sell the fake to convince your opponent a kick is coming, rather than making a subtle movement that lacks conviction.
How does the Liver Kick work?
The Liver Kick targets the right side of the opponent's body at the level of the floating ribs, aiming to impact the liver — an organ highly sensitive to blunt trauma that, when struck cleanly, produces immediate incapacitating pain and involuntary collapse. The liver sits beneath the right ribcage and is only partially protected by the lower ribs, making it vulnerable to powerful roundhouse kicks delivered with proper aim.
Where does the Liver Kick come from?
Targeting the liver with body kicks has been a known strategy in Muay Thai and kickboxing for decades, though the technique gained mainstream recognition through fighters like Bas Rutten, Mirko Cro Cop, and Giorgio Petrosyan. In boxing, the liver punch has long been a fight-ending weapon, and kickers adapted the same anatomical targeting to their round kicks.
Is the Liver Kick legal in competition?
Unified MMA: legal — Legal striking technique; WBC/Boxing: banned — All kicks prohibited in boxing; WKF: legal — Legal, chudan (body) kick scores 2 points, jodan (head) kick scores 3 points; Kyokushin: legal — Legal at full power to body and head; WT: legal — Legal, body kick 2 points, head kick 3 points, spinning body 4 points, spinni…; WAKO: legal — Legal in Full Contact and Low Kick formats; K: legal — 1/GLORY — Legal; IFMA: legal — Legal — kicks are a core Muay Thai technique
How dangerous is the Liver Kick?
Danger rating 6/10. High — most common KO kick; generates ~1,000N force to head (Falco et al. 2009)
How do I set up the Liver Kick?
The standard setup chain: Stance and Range → Chamber the Leg → Execute the Kick → Recover.
How do I defend against the Liver Kick?
Standard counters include: Check (Shin Block) — raise the shin to intercept the kick before it lands / Catch and Sweep — catch the kicking leg and sweep the standing leg / Step Inside — close distance inside the kick's effective range to smother it.
What are the variants of the Liver Kick?
Common variants: Standard roundhouse (rear leg) (full hip rotation, shin strikes the target); Lead leg roundhouse (switch kick) (switch-step to generate power from the lead side); Low roundhouse (leg kick) (targeting the thigh to damage the opponent's base); Head kick (high roundhouse targeting the temple or jaw).
How effective is the Liver Kick in competition?
Bas Rutten used liver kicks to finish opponents in Pancrase and the UFC, and his body-kick expertise became his signature. Mirko Cro Cop's left high kick was his most famous weapon, but his left body kick to the liver was equally effective in PRIDE FC.
What are common mistakes when doing the Liver Kick?
Top errors to watch for: Aiming too high and hitting the ribs or too low and hitting the hip — the liver window is specific and narrow / Kicking without first moving the opponent's guard away from the body through head feints or punches / Throwing the liver kick from too far away so only the foot connects — the shin must land for maximum impact / Not following through and allowing the kick to slap rather than dig into the body.
What are other names for the Liver Kick?
The Liver Kick is also known as Ribā Kikku, Tee Tap, Liver Shot Kick, Right Body Kick.