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What do ab curls work?

Author

Daniel Martin

Updated on March 14, 2026

What do ab curls work?

They target the rectus abdominis, the six-pack muscle that runs along the front of the torso. Building this muscle is one part of developing your core muscles for stability and performance.

What is a ab curl?

Start lying on your back with bent legs. Straighten your arms and hold them slightly off the ground with your palms down. Exhale and crunch up. Extend your arms up and reach them toward your shins. Lower smoothly with an exhale.

What is abdominal curl test?

The abdominal curl (or crunch) test is used to measure the strength/endurance of a clients abdominal muscles.

What are the benefits of abdominal crunches?

Abdominal crunches are designed to tone the core muscles of the body. The exercise aids in strengthening the core muscles, improving the posture, and increasing the mobility and flexibility of the muscles. When these exercises are performed, the rectus abdominus and the oblique muscles are tightened.

Are ab crunches effective?

How effective are crunches as an abs exercise? Crunches may feel effective while you’re doing them but they are generally not the best exercise for your abs. Varying the planes of movement, angles and positions will result in the most benefit for your core.

What is the benefit of crunches?

Like situps, crunches help you build muscle. But unlike situps, they work only the abdominal muscles. This intense muscle isolation makes them a popular exercise for people trying to get six-pack abs. This also makes them ideal for strengthening your core, which includes your lower back muscles and obliques.

What are abdominal muscles?

The abdominal muscles are located between the ribs and the pelvis on the front of the body. The abdominal muscles support the trunk, allow movement and hold organs in place by regulating internal abdominal pressure.

What is the classification of curls up?

Assessment

Classification<3535-45
Excellent6050
Good4540
Fair3025
Poor1510