Underhooks and Frames in MMA

Learn the difference between underhooks and frames for MMA clinch fighting. Control your opponent, create space, and stop takedowns with these core skills.

Context

The clinch is chaos for beginners.

It’s that ugly, in-between range where striking distance has closed but the fight isn't on the ground yet. You're chest-to-chest, often against the cage. It's where takedowns happen, where fighters get held and exhausted, and where short, brutal strikes end fights.

Most beginners have no plan here. They either try to box too close or try to grapple without understanding the striking threat. This is where the idea of learning separate martial arts breaks down. Clinching is pure MMA. It's not boxing, not wrestling, not BJJ — it's all of them at once. Why Learning MMA Like Separate Sports Fails is a reality that becomes obvious in the clinch.

To navigate this range, you need tools. The two most fundamental tools are the underhook and the frame. They are your rudder in the storm. One is for control, the other is for space. Master both, and you control the clinch.

The Mistake

When a beginner gets clinched, they panic. They react with one of two bad instincts.

First, they try to push their opponent away with straight arms, like a standing bench press. This burns your energy, compromises your posture, and makes you incredibly easy to throw or unbalance. Your arms are weakest when fully extended. An experienced opponent will use your push to move you exactly where they want you.

Second, they grab blindly. They might grab the head in a Muay Thai plum, only to get their legs taken out from under them by a wrestler. Or they grab over their opponent’s arms (overhooks) without a purpose, letting the other fighter gain dominant body control. They are holding on, but they aren't in control.

The result is the same: you get shoved against the fence, your posture is broken, you can't breathe, and you spend the rest of the round just surviving. You lose the position, you lose the round, and often, you lose the fight because you didn't have a plan for this critical range.

The Principle

The solution is to replace panic with principles. The two governing principles of the clinch are controlling your opponent's body with underhooks and creating space with frames.

Underhooks for Control

The underhook is your primary tool for dominance and offense in the clinch. You get an underhook by putting your arm under your opponent's arm and connecting your hand high on their shoulder blade or back.

The principle is simple: inside position is control.

With a deep underhook, you have a powerful lever on your opponent's shoulder and upper body.

An underhook isn’t just a position; it’s a weapon.

Frames for Space

A frame is your primary tool for defense and escape. You create a frame by using the bones of your forearm and arm to create a rigid structure against your opponent.

The principle is: bone beats muscle.

Instead of trying to push a 200lb opponent off you with your muscles, you place a rigid forearm against their throat, collarbone, or hip. You are not pushing; you are creating a structural barrier that stops their forward pressure. A frame keeps them from crushing you and gives you just enough room to breathe and think.

A frame is not a position to hang out in. It’s a temporary tool to create space so you can escape or transition to a better position, like fighting for your own underhook.

Practical Application

You don't need a high-level training partner to drill these concepts. The basic movements can be learned at home and then sharpened with a partner. If you're wondering how to start MMA training at home, these drills are a perfect example.

The Pummeling Drill

This is the single most important drill for learning to fight for underhooks.

  1. Stand with a partner, chest to chest.
  2. Each of you starts with one underhook and one overhook (your arm over their arm). Your head should be on the same side as your underhook, with your ear on their chest.
  3. The goal is to fight for double underhooks. From your overhook side, "swim" your arm inside and under their armpit to get a second underhook.
  4. Your partner is doing the same thing. It becomes a continuous flow of swimming for inside control.
  5. Focus on staying heavy, keeping your hips low, and maintaining good head position.

Start slow. Feel the movement. Then, add speed and resistance. This builds the muscle memory you need to fight for control automatically.

Wall Pummeling

This drill simulates being trapped against the cage.

  1. One person stands with their back against a wall. The other person presses into them.
  2. The person on the wall has one objective: get double underhooks and use them to turn the opponent and get their own back off the wall.
  3. The person pressing has one objective: maintain control, use overhooks or frames to prevent the turn, and keep their opponent pinned.

This drill teaches you the urgent importance of underhooks for both offense and defense in MMA's most common clinching scenario.

Frame and Step Drill

This drill teaches you how to create space without wasting energy.

  1. Have a partner press into you, simulating a clinch entry.
  2. As they press, don't push back. Instead, place one forearm across their neck/collarbone area to create a frame. Keep your elbow tucked.
  3. Your other hand controls their bicep on the opposite side to prevent them from punching you.
  4. Hold the frame rigid. Now, instead of pushing them, use your feet. Take small, circular steps away from their pressure.
  5. You will feel that you can move your entire body away, creating space to escape, while they are stuck pushing into your bony frame.

Tradeoff

No technique is free.

The Underhook Tradeoff: When you dig for a deep underhook, you bring your arm up and away from your body. This can expose your head to short punches and elbows over the top. It can also expose that arm to a kimura lock if your opponent is a savvy grappler and you are careless with your hand position. Getting an underhook is a commitment.

The Frame Tradeoff: Frames are defensive. While you are framing, you are not controlling your opponent or launching effective offense. A frame is a temporary shield. If you hold it for too long or extend your arm completely straight, your opponent can trap it, break your posture, and pass to an even more dominant position. A frame is a means to an end—escape or transitioning to your own control.

Action Step

You can start building these skills right now, alone.

Stand in front of a wall. Place your forearms on it as if you were framing an opponent. Lean your body weight into the wall. Feel how your bone structure supports you, not your muscles. Get used to that feeling of a rigid, structural hold. This is a frame.

Next, stand in open space and practice the pummeling motion. Swim your right arm in as if getting an underhook. Then your left. Repeat for 2 minutes. Visualize having an opponent in front of you. This teaches your body the basic pathway for fighting for inside control. Do this every day.

Next Step

If you want a structured system to actually improve, join MMA Fundamentals.

Start building real MMA skill with a step-by-step progression.

Plans start at $5/month — https://www.skool.com/hqsystems/about