Lying Straight Leg Reverse Crunch
Lying Straight Leg Reverse Crunch Exercise Description
The lying straight leg reverse crunch is a bodyweight floor exercise that emphasizes rectus abdominis by curling the pelvis toward the ribcage with controlled lumbar flexion. Keeping the legs straight increases the lever arm, challenging lumbopelvic control and anti-extension stability. The obliques assist in stabilizing the pelvis, while the hip flexors primarily hold the legs in position rather than driving the movement. The goal is a small, precise posterior pelvic tilt that briefly lifts the tailbone, not a swing of the legs or a roll onto the upper back. Use slow, smooth motion and consistent breathing to maintain tension without arching the lower back.
- Muscle Groups: Abs, Core, Waist
- Target Muscles: Rectus Abdominis
- Assisting Muscles: Gluteus Maximus
- Stabilizing Muscles: External Obliques, Iliacus, Internal Obliques, 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 Lying Straight Leg Reverse Crunch Exercise
‘- Lie supine with arms by your sides, palms down; set shoulder blades gently retracted and down.
– Keep head and neck neutral with a light chin tuck; eyes to the ceiling.
– Bring both legs together, knees extended but not locked, feet pointed toward the ceiling so hips are roughly 90° flexed.
– Pre-tension: exhale slightly, draw ribs down, brace the abdominal wall; set a light posterior pelvic tilt so the low back is gently contacted with the floor.
– Initiate the rep by curling the pelvis upward—lift the tailbone 2–5 cm—pulling the pubic bone toward the sternum; keep legs stacked over the hips.
– Do not swing or throw the legs; avoid pushing hard through the hands.
– Pause briefly at the top with controlled breath, maintaining a quiet ribcage.
– Lower slowly, articulating the spine back down until the sacrum rests; stop before the low back arches or the pelvis anteriorly tilts.
– Keep motion small and precise; prioritize smooth control over height.
– Technique options: maintain a slight knee bend if needed to reduce leverage; widen hand placement for balance while keeping shoulders relaxed.
Lying Straight Leg Reverse Crunch Tips
‘- Lie with arms by your sides, palms down, and shoulder blades gently retracted and down.
– Keep your head and neck neutral with a light chin tuck and eyes directed at the ceiling.
– Bring both legs together with knees extended but not locked and feet pointed toward the ceiling so hips are about 90° flexed.
– Before moving, exhale slightly, draw the ribs down, brace the abdominal wall, and set a light posterior pelvic tilt so the low back gently contacts the floor.
– Initiate each rep by curling the pelvis upward to lift the tailbone 2–5 cm, pulling the pubic bone toward the sternum.
– Keep the legs stacked over the hips and avoid swinging or throwing the legs.
– Do not push hard through the hands; let the abs drive the movement.
– Pause briefly at the top with controlled breathing and a quiet ribcage.
– Lower slowly, articulating the spine back down until the sacrum rests, stopping before the low back arches or the pelvis tilts forward.
– Keep the motion small and precise, prioritizing smooth control over height; if needed, use a slight knee bend or widen hand placement for balance while keeping shoulders relaxed.
Lying Straight Leg Reverse Crunch Beginner Introduction
The lying straight leg reverse crunch is a floor-based core move that centers on a subtle, controlled lift of the hips rather than a big swing of the legs. From a position on the back with the legs reaching upward, the lower spine gently rounds as the front of the hips draw slightly toward the chest. This action briefly raises the tailbone from the ground in a small, smooth arc, then returns it with the same level of control.
The main effort comes from the abs, which create the lifting motion, while the side abs contribute by steadying the pelvis so the movement stays clean and centered. The hip flexors mainly support the leg position instead of powering the curl. Because the legs remain long, the core works harder to resist the lower back from arching. Breathing stays steady and controlled throughout, helping maintain tension and a calm upper body. The emphasis is on precision, gentle range, and solid control rather than height or speed.