Serratus Punch: A Complete Guide

Quick Intro

Serratus Punch is a shoulder blade exercise performed lying on the back with the arms extended toward the ceiling, punching upward by protracting the shoulder blades without bending the elbows.

Equipment Needed

No equipment is needed for Serratus Punch. It’s performed lying on the floor with the arms extended toward the ceiling.

Why Serratus Punch Matters

The muscle that wraps around the side of the ribcage and anchors the shoulder blade to the trunk (serratus anterior) is easy to overlook, since most pressing and pulling exercises let the shoulder blade ride along passively while the arm does the visible work. Serratus Punch isolates exactly the opposite: the elbows stay locked and still, and the only motion is the shoulder blades reaching further off the ribcage, which is the specific job this muscle does. The serratus anterior itself drives the reach, with a smaller chest muscle underneath the main one (pectoralis minor) and the chest (pectoralis major) assisting, the front of the shoulder (anterior deltoid), traps (trapezius) and triceps stabilizing the arm’s fixed position and the abs (rectus abdominis) bracing the trunk against the small reaching motion. Coordination is clearly the leading quality here, since isolating the shoulder blade’s own small motion away from the arm and elbow is a specific, easy-to-lose skill rather than a broad physical demand. Muscular endurance also gets modest work as the serratus anterior keeps firing through repeated reaches.

When to Do It

Serratus Punch works well as a warm-up activation drill before an overhead pressing session, since a well-functioning serratus anterior supports healthy shoulder blade movement during any overhead work, or worked into a shoulder-health-focused block on its own. It’s gentle enough that most people can add it in freely.

Getting Ready

A few gentle shoulder blade squeezes and releases, without the arms extended yet, confirm the shoulder blades move freely before the punching motion is added.

Step-by-Step Instructions

Lie on the back with both arms extended straight up toward the ceiling, elbows locked in a fixed position.

Punch upward by reaching the shoulder blades further off the floor, without bending the elbows or letting the arms travel higher into the air.

Lower the shoulder blades back to the floor with control and repeat.

How Many, How Often

Serratus Punch is dosed by clean reps, with the set ending once the elbows start bending to fake more range, not at a fixed count.

Keeping the motion small matters more here than how high the arms appear to reach, since only the shoulder blades should lift off the floor, not the arms driving higher into the air.

Modifications and Variations

This exercise has two variations: Serratus Punch — Dumbbell, a harder version that adds light dumbbells for greater serratus anterior strength demand, and Serratus Punch — Alternating, an alternative that punches one arm at a time in a continuous rhythm instead of both together.

Progression path: Serratus Punch grooves the bilateral isolation pattern first, Serratus Punch — Alternating adds a timing and coordination layer, then Serratus Punch — Dumbbell adds external resistance.

Common Mistakes to Avoid

Bending the elbows to fake more range of motion. The moment the elbows unlock, the triceps and shoulder take over from the serratus anterior, and the exercise stops isolating the muscle it’s meant to train. Keeping the elbows in a fixed, locked position throughout is the one non-negotiable check.

Turning the small shoulder-blade reach into a big arm-driving motion. The visible range of this exercise should be small, just the shoulder blades lifting off the floor, and trying to make it look bigger by driving the whole arm higher misses the point entirely. Trusting that a small, correct motion is doing its job is the standard here.

After Your Set

A set of these leaves the shoulder blades and chest lightly worked. A gentle overhead reach and a few shoulder blade squeezes bring the upper back back to a relaxed range afterward.

Going Deeper

Serratus Punch fits well early in a session as shoulder activation, since a well-primed serratus anterior supports cleaner overhead mechanics in whatever pressing or overhead work follows.

Progress here is defined by how isolated the shoulder-blade reach stays with the elbows locked, not by how big the visible motion looks. Someone who’s driving the arms higher into the air but bending the elbows to do it hasn’t trained the pattern, even if the range looks larger. Once the reach stays small and isolated at a controlled pace, the serratus anterior has taken over the movement.

Most people need only a handful of sessions before the isolated reach stops feeling like it wants to turn into a bigger arm motion.

How to Know You’re Improving

1. The elbows stay locked and still through the entire set
2. The reach comes visibly from the shoulder blades, not the arms
3. A higher rep count doesn’t bring back the temptation to bend the elbows
4. Ready to try Serratus Punch — Alternating’s added timing layer

Locked elbows through the whole set are a better sign of progress here than how high the arms appear to reach.

Muscles Worked

• Serratus Anterior (a muscle along the side of the ribcage, pushing the shoulder blade forward around the ribs)
• Pectoralis Minor (a smaller chest muscle beneath the pectoralis major, assisting the blade’s travel forward)
• Pectoralis Major (the chest muscle, adding to the upward push of the arms)
• Anterior Deltoid (the front of the shoulder cap, holding the arms vertical through every punch)
• Trapezius (the broad muscle spanning the upper back and neck, releasing enough to let the blade slide forward)
• Triceps Brachii (the back of the upper arm, keeping both elbows locked so the movement comes from the blades)
• Rectus Abdominis (the abdominal muscles running down the front of the stomach, holding the ribcage down against the press)

FAQ

Why is the range of motion so small in this exercise? Because the serratus anterior’s job is reaching the shoulder blade off the ribcage, a small motion, and exaggerating the range by bending the elbows shifts the work to other muscles (see Why It Matters above).

What’s a common mistake here? Bending the elbows to fake more range of motion, which lets the triceps and shoulder take over from the serratus anterior (see Common Mistakes to Avoid above).

Should I try the alternating version before adding weight? That’s a reasonable order. Serratus Punch — Alternating adds a coordination layer without extra load, while Serratus Punch — Dumbbell adds resistance to the bilateral pattern.

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Part of the serratus punch family alongside Serratus Punch — Alternating and Serratus Punch — Dumbbell.