Pushups mainly work your chest , triceps, and shoulders, while also heavily training your core and other stabilizing muscles.

What Muscles Do Pushups Work?

Primary muscles

These are the main movers in a standard pushup:

  • Chest (pectoralis major and minor): Main driver of the push; controls lowering and pressing away from the floor.
  • Triceps brachii: Straighten your elbows as you push the body up.
  • Anterior deltoids (front shoulders): Help with pushing and stabilizing the shoulder joint.

Think of a pushup as a horizontal bench press using your bodyweight.

Secondary & stabilizer muscles

These muscles assist and keep your body rigid:

  • Core: Rectus abdominis, obliques, and transverse abdominis work like a moving plank to keep your torso straight.
  • Serratus anterior: Along the side of your ribs, helps control and stabilize your shoulder blades.
  • Rotator cuff and scapular stabilizers: Small muscles that keep your shoulder joint in a safe, stable position during the movement.
  • Glutes and quadriceps: Squeeze to keep your hips from sagging and maintain a straight line from head to heels.
  • Upper back (trapezius, rhomboids to a lesser extent): Help with posture and shoulder positioning, and can be hit more with certain variations.

In practice, a “simple” pushup is a full-body tension exercise, not just an arm workout.

Quick HTML table for clarity

html

<table>
  <thead>
    <tr>
      <th>Muscle group</th>
      <th>Main muscles</th>
      <th>Role in a standard pushup</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Chest</td>
      <td>Pectoralis major, pectoralis minor</td>
      <td>Primary pushing power; controls lowering and pressing up.[web:1][web:3][web:5][web:7]</td>
    </tr>
    <tr>
      <td>Triceps</td>
      <td>Triceps brachii</td>
      <td>Extends the elbow to straighten the arms at the top.[web:3][web:5][web:9]</td>
    </tr>
    <tr>
      <td>Shoulders</td>
      <td>Anterior deltoids</td>
      <td>Assist chest in pushing and stabilize the shoulder joint.[web:3][web:5][web:7][web:9]</td>
    </tr>
    <tr>
      <td>Core</td>
      <td>Rectus abdominis, obliques, transverse abdominis</td>
      <td>Keeps body in a straight line, like a plank while moving.[web:1][web:3][web:5][web:9]</td>
    </tr>
    <tr>
      <td>Scapular area</td>
      <td>Serratus anterior, rotator cuff, scapular stabilizers</td>
      <td>Controls shoulder blades, protects shoulders, stabilizes upper body.[web:1][web:3][web:8][web:9]</td>
    </tr>
    <tr>
      <td>Lower body</td>
      <td>Glutes, quadriceps</td>
      <td>Maintain rigid body line, prevent hips from sagging.[web:3][web:4][web:9]</td>
    </tr>
    <tr>
      <td>Upper back (support)</td>
      <td>Trapezius, rhomboids</td>
      <td>Help posture and shoulder positioning, more involved in some variations.[web:5][web:8][web:9]</td>
    </tr>
  </tbody>
</table>

One simple way to “feel” it

If you want to feel what muscles pushups work:

  1. Do a slow set of 8–10 pushups, lowering for 3 seconds and pushing up fast.
  2. Focus on squeezing your chest at the top, bracing your core, and tightening your glutes.
  3. Notice the pump in your chest and triceps and the tension in your midsection—that’s where most of the work is happening.

TL;DR: A standard pushup works your chest, triceps, and front shoulders as the main movers, while your core, serratus anterior, glutes, quads, and upper back stabilize your body in a straight line.

Information gathered from public forums or data available on the internet and portrayed here.