Reverse Crunch

Reverse Crunch Exercise Description

The reverse crunch is a bodyweight core exercise that emphasizes the rectus abdominis with assistance from the external and internal obliques. Performed supine, it trains controlled posterior pelvic tilt and lumbar flexion by lifting the tailbone off the floor rather than curling the head and shoulders. Keeping the knees bent reduces leverage and helps minimize excessive hip flexor dominance. Because the movement originates from the pelvis, it encourages lumbopelvic control while keeping the neck and upper back relaxed on the mat. Use smooth, momentum-free reps to keep the abdominal wall doing the work and to limit stress to the lumbar region.

Muscle Groups: Abs, Core, Waist
Target Muscles: Rectus Abdominis
Assisting Muscles: External Obliques, Internal Obliques
Stabilizing Muscles: Iliacus, Multifidus, Psoas Major, 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 Reverse Crunch Exercise

‘- Lie on your back with head and shoulders relaxed, arms at your sides, palms up to avoid pressing.
– Bend hips and knees to about 90 degrees; lift feet so shins are parallel to the floor.
– Lightly brace your abdominal wall and posteriorly tilt the pelvis to gently flatten the low back to the mat.
– Exhale and initiate the move by curling the pelvis, lifting the tailbone a few centimeters as knees travel toward the chest.
– Keep knees bent and rib cage down; avoid swinging the legs or kicking for momentum.
– Pause briefly at the top while keeping neck and shoulders relaxed on the floor.
– Inhale and lower with control, returning the spine to the mat one segment at a time.
– Stop when the low back returns to the mat without arching; keep feet off the floor between reps if you can maintain control.
– Do not push with your hands or brace against the floor; let the abdominal contraction drive the motion.

Reverse Crunch Tips

‘- Keep your head and shoulders relaxed on the mat instead of curling them up.
– Position hips and knees at about 90 degrees so your shins stay parallel to the floor.
– Turn your palms up so you’re less likely to press your arms into the floor.
– Lightly brace your abdominal wall and posteriorly tilt your pelvis to gently flatten your low back before you lift.
– Initiate each rep by curling the pelvis and lifting the tailbone a few centimeters as the knees travel toward the chest.
– Keep your knees bent and rib cage down, avoiding any swinging or kicking for momentum.
– Pause briefly at the top while keeping your neck and shoulders relaxed on the floor.
– Inhale and lower with control, returning your spine to the mat one segment at a time.
– Stop lowering when your low back returns to the mat without arching, keeping feet off the floor only if you can maintain control.
– Perform smooth, momentum-free reps so the abdominal wall drives the motion instead of your arms or the floor.

Reverse Crunch Beginner Introduction

The reverse crunch is a bodyweight core movement that centers on the abs with help from the side abs. Rather than curling the head and shoulders, this exercise revolves around gently lifting the tailbone from the floor while lying on the back. Bent legs shorten the distance from the hips to the feet, which reduces leverage and emphasizes the midsection instead of the front of the hips. The action comes from a subtle rolling of the pelvis, so the neck and upper back can rest against the mat throughout the motion.

This exercise highlights careful control rather than speed or momentum. The legs travel toward the torso as the pelvis curls, raising the tailbone only a small amount, then the spine settles back down smoothly. Arms rest at the sides without pressing into the ground, allowing the abs to drive the movement. Done in this deliberate way, the reverse crunch targets the core while aiming to limit strain on the lower back and encourage better coordination between the pelvis and spine.