Curl-Up
Curl-Up Exercise Description
The curl-up is a bodyweight anterior-core exercise that emphasizes the rectus abdominis through controlled trunk flexion. Unlike a full sit-up, the curl-up limits motion mostly to the thoracic spine while keeping the pelvis quiet and the low back in light contact with the floor. This helps reduce hip-flexor dominance and keeps the effort centered on the abdominal wall. Primary muscle worked: rectus abdominis; assistants/stabilizers include the external and internal obliques and the transverse abdominis. The goal is smooth, segmental “ribcage toward pelvis” curling with steady breathing and a neutral, supported neck.
- Muscle Groups: Abs, Core, Waist
- Target Muscles: Rectus Abdominis
- Assisting Muscles: External Obliques, Internal Obliques
- Stabilizing Muscles: Transversus Abdominis
- Body Area: Upper Body
- Body Parts: Core, Torso
- Body Surface: Front
- Body Symmetry: Other
- Equipment: Bodyweight
- Exercise Patterns: Other
- Exercise Type: Strength
- Functional Grouping: Trunk Flexors
- Joint Involvement: Single-joint
- Muscle Location: Stomach
- Movement Direction: Vertical
- Muscle Position: Anterior
- Gender: Female
How To Do The Curl-Up Exercise
‘- Lie on your back with knees bent ~90°, feet flat and hip-width apart.
– Place fingertips lightly behind your ears (or cross arms on your chest); keep elbows open—do not pull on your head.
– Set your neck neutral: gently tuck the chin (eyes to the ceiling) to avoid forward head jutting.
– Lightly brace the abdominal wall as if preparing for a cough.
– Exhale and initiate by drawing the ribs down toward the pelvis.
– Peel the head, neck, and shoulder blades off the floor until the lower edges of the shoulder blades just clear.
– Keep the low back in light, comfortable contact with the floor—avoid arching or forcefully pressing it down.
– Pause briefly at the top while maintaining the abdominal brace; elbows stay wide.
– Inhale and lower slowly, returning the spine to the mat with control.
– Keep feet and hips quiet; avoid yanking the neck, leading with the elbows, or turning it into a full sit-up.
Curl-Up Tips
‘- Lie on your back with knees bent about 90°, feet flat and hip-width apart.
– Place fingertips lightly behind your ears or cross your arms on your chest, and keep the elbows open—do not pull on your head.
– Gently tuck your chin with eyes to the ceiling to keep the neck neutral and avoid forward head jutting.
– Lightly brace the abdominal wall as if preparing for a cough before you start curling up.
– Initiate the curl-up by drawing your ribs down toward your pelvis as you exhale.
– Peel the head, neck, and shoulder blades off the floor only until the lower edges of the shoulder blades just clear.
– Keep the low back in light, comfortable contact with the floor—avoid both arching and forcefully pressing it down.
– Pause briefly at the top, maintaining the abdominal brace and keeping the elbows wide.
– Inhale and lower slowly with control, returning the spine to the mat smoothly.
– Keep feet and hips quiet; avoid yanking the neck, leading with the elbows, or turning the motion into a full sit-up.
Curl-Up Beginner Introduction
The curl-up is a controlled bodyweight movement for the front of the core, with most of the work coming from the abs while the upper spine rounds gently off the floor. Compared with a full sit-up, this version concentrates motion in the upper back region, while the pelvis and lower back remain relatively still against the ground. That design shifts emphasis toward the abdominal wall and less toward the hip flexors, creating a very precise, small-range action rather than a big, swinging lift.
Throughout the rep, the neck stays in a comfortable, supported position and the ribs glide toward the hips in a smooth, segment-by-segment curl. The side abs and deep abs assist the main abdominal muscles, contributing to overall core stability. Breathing remains steady, with the exhale helping the front of the torso engage and the inhale supporting a gradual return to the mat. For many beginners and experienced lifters alike, this exercise serves as a focused way to practice slow, deliberate trunk flexion with strong muscular control and minimal strain elsewhere.