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Which Muscles do Push-Ups Work?

by
author image William McCoy
Toronto-based journalist William McCoy has been writing since 1997, specializing in topics such as sports, nutrition and health. He serves as the Studio's sports and recreation section expert. McCoy is a journalism graduate of Ryerson University.
Which Muscles do Push-Ups Work?
Which Muscles do Push-Ups Work? Photo Credit Laura Drilling/Demand Media

The basic push-up is perhaps the first exercise most kids learn. It's also one most adults can do even if they aren't putting in gym time. You can't do a proper push-up unless you have several major muscle groups working together, but it will most help those in the chest area.

Target Muscle

Which Muscles do Push-Ups Work?
Photo Credit Laura Drilling/Demand Media

The exercise targets the pectoralis major muscles and, more specifically, the muscles' sternal heads. People commonly refer to the pectorals as pecs or chest muscles, and the sternal heads make up the bulk of your chest. Strength in these muscles helps you accomplish a number of movements, including the internal rotation and extension of your shoulder.

Synergist Muscles

Which Muscles do Push-Ups Work?
Photo Credit Laura Drilling/Demand Media

ExRx.net notes that when you perform a push-up correctly, you're using three synergist muscles. The clavicular head of the pectoralis major, the anterior deltoid and the triceps brachii are found in your chest, shoulders and rear of your upper arms, respectively. In strength-training terms, a synergist muscle helps you accomplish the movement. For example, when you push yourself away from the floor, you work your triceps muscles.

Stabilizer Muscles

Which Muscles do Push-Ups Work?
Photo Credit Laura Drilling/Demand Media

This exercise also engages the rectus abdominis, obliques and quadriceps. Your abs and obliques are core muscles while your quadriceps are the large muscles in the front of each upper leg. These stabilizer muscles contract with little movement during the exercise. For example, you contact your abs and obliques to help keep your back straight during the push-up.

Other Muscles

Which Muscles do Push-Ups Work?
Photo Credit Laura Drilling/Demand Media

Execution of a push-up also requires the short head of your biceps brachii and erector spinae muscles. These muscles are found in the front of your upper arm and along your spine, respectively. During a push-up, your biceps are a dynamic stabilizer, while your erector spinae is an antagonist stabilizer. Both types of stabilizer help you execute the movement.

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