Leg Kick

Last updated: April 12, 2026

What is a leg kick?

A leg kick (also called a low kick) is a roundhouse-style strike where a fighter swings their shin into the lower half of an opponent’s body, targeting either the thigh or the calf. The terms “leg kick” and “low kick” mean the same thing and are used interchangeably across MMA and Muay Thai, as well as kickboxing and full-contact karate styles like Kyokushin.

The technique originates in Muay Thai, where it has been a staple of stand-up fighting for centuries. As MMA developed through the 1990s and 2000s, fighters from Muay Thai and kickboxing backgrounds brought the leg kick into the cage, and it became standard across all levels of competition. Marco Ruas used leg kicks to dismantle Paul Varelans at UFC 7 in 1995, one of the earliest high-profile demonstrations of the technique in MMA.

In a fight, leg kicks serve several purposes. They reduce an opponent’s ability to move in and out of range, making them easier to hit with punches or takedowns. They also force opponents to shift their weight and stance, opening up targets elsewhere. Because they require relatively little energy to throw and keep the fighter at a safe distance, leg kicks are a low-risk way to score damage without committing to a more dangerous exchange.

Types of leg kicks

There are three main types of leg kicks used in MMA. Each targets a different part of the opponent’s leg and produces different effects.

Type	Target area	What it does
Outside thigh kick	Outer quadriceps muscle	Causes cumulative bruising and swelling, reduces mobility over time
Inside leg kick	Inner thigh, just above the knee	Disrupts balance by displacing the lead leg sideways
Calf kick	Lower leg, below the knee	Targets the peroneal nerve; can cause immediate loss of leg control

The outside thigh kick is the most traditional version, rooted in Muay Thai. The inside leg kick gained popularity in MMA because it is harder to see coming and can knock an opponent’s lead leg out of position. The calf kick is the newest addition to the MMA striking landscape. It surged in popularity around 2020–2021 after several high-profile UFC fights demonstrated how quickly it could compromise a fighter’s ability to stand.

Why leg kicks hurt

The pain from a leg kick comes down to anatomy. The striking surface is the mid-shin, which is one of the densest bones in the body. When that dense bone connects with the soft muscle tissue of the thigh or calf, the impact causes immediate pain, bruising, and swelling.

What makes leg kicks especially dangerous is the peroneal nerve (also called the common fibular nerve). This nerve runs along the outside of the leg just below the knee, close to the surface, with little muscle protecting it. A clean kick to this area can temporarily shut down motor control in the lower leg and foot, a condition sometimes called “drop foot.” The fighter’s leg stops responding, and no amount of willpower can override the nerve damage until it recovers.

According to Wikipedia’s entry on the peroneal strike, the resulting numbness and loss of motor control can last anywhere from 30 seconds to several hours, depending on severity. In MMA, that kind of window is more than enough to end a fight.

Calf kick vs. thigh kick

Because both target the leg, calf kicks and thigh kicks are often grouped together. But they work differently and carry different risks.

	Calf kick	Thigh kick
Target	Calf muscle and peroneal nerve	Quadriceps (outer thigh)
Damage type	Nerve disruption, immediate dysfunction	Muscle bruising, cumulative damage
Kicks to take effect	Often 2–5 clean kicks	Sustained volume over multiple rounds
Easier to check with a standard shin block	Harder to check (low angle)	Missing can hit the knee or shin, risking fracture
Risk to the kicker	Missing can hit knee or shin, risking fracture	Lower risk of self-injury

The thigh kick is the older and more traditional weapon. It works through accumulation: repeated strikes to the quadriceps cause progressive swelling and pain that slows a fighter down over time. The calf kick works through disruption. Because it targets the peroneal nerve directly, even a few well-placed kicks can make a fighter’s leg buckle.

Both have a place in MMA, and many fighters use them together, switching between targets to keep an opponent guessing about where the next kick will land.

How leg kicks are defended

The primary defense against a leg kick is called “checking.” A fighter lifts their lead leg and turns the shin outward to meet the incoming kick bone-on-bone. Instead of absorbing the strike on soft muscle, the kicker’s shin collides with the defender’s hard upper tibia or knee. This hurts the attacker and discourages further kicks.

Checking carries its own risks. At UFC 168 in December 2013, Anderson Silva threw a low kick that Chris Weidman checked, and the impact broke Silva’s tibia. The same injury happened to Weidman himself at UFC 261 in April 2021. These are extreme cases, but they illustrate why throwing unchecked, predictable leg kicks is dangerous.

Fighters can also defend leg kicks by moving out of range, adjusting their stance to present a less vulnerable angle, or countering with punches as the kick comes in. The threat of a counter is one reason leg kicks are almost always set up with a punch or feint first, rather than thrown by themselves.

Frequently Asked Questions

Can a leg kick end a fight?

Yes. If leg kicks cause enough damage that a fighter cannot stand or defend themselves, the referee or ringside doctor can stop the bout. This results in a TKO.

Are leg kicks legal in all MMA rulesets?

Leg kicks are legal under the Unified Rules of MMA, which govern the UFC and most major promotions. They are prohibited in some styles of American kickboxing.

What is the difference between a leg kick and a low kick?

There is no difference. The terms are interchangeable. “Leg kick” is more common in MMA commentary, while “low kick” is more common in Muay Thai and kickboxing.

Do leg kicks work against bigger opponents?

Leg kicks are effective regardless of size because they target nerves and muscles that are vulnerable in every body type. Mobility is reduced the same way whether the recipient weighs 135 or 265 pounds.

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Sources

1. Wikipedia. “Low kick.” Accessed April 2026.
2. Wikipedia. “Peroneal strike.” Accessed April 2026.
3. Evolve MMA. “The Beginner’s Guide to Leg Kicks in MMA.” Accessed April 2026.
4. StrictlyFighters. “What Are Leg Kicks & Why Do They Hurt So Much?” Accessed April 2026.
5. MMAailm.ee. “The Rise of Calf Kicks in MMA: Anatomy of a Game-Changer.” Accessed April 2026.

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