Groin Crunch
Groin Crunch Exercise Description
The Groin Crunch (a figure‑four cross‑body crunch) is a floor-based abdominal exercise that prioritizes the rectus abdominis with assistance from the external and internal obliques. You create a figure‑four with the legs to stabilize the pelvis and bias a small, controlled trunk rotation toward the planted side. The movement is a short-range spinal flexion initiated by bringing the ribcage toward the pelvis, not by pulling on the neck. Expect the shoulder blades to lift from the floor while the low back stays gently anchored via a slight posterior pelvic tilt. The crossed‑leg position may lightly open the hip of the top leg, but the primary training effect is core musculature, not the inner thigh. This bodyweight drill is useful when you want a simple, equipment‑free way to practice precise trunk flexion and rotation with good neck and pelvic control.
- Muscle Groups: Abs, Core, Waist
- Target Muscles: Rectus Abdominis
- Assisting Muscles: External Obliques, Internal Obliques
- Stabilizing Muscles: Multifidus, Transversus Abdominis
- Body Area: Upper Body
- Body Parts: Core, Torso
- Body Surface: Front
- Body Symmetry: Unilateral
- Equipment: Bodyweight
- Exercise Patterns: Other
- Exercise Type: Strength
- Functional Grouping: Trunk Flexors
- Joint Involvement: Single-joint
- Muscle Location: Stomach
- Movement Direction: Other
- Muscle Position: Anterior
- Gender: Male
How To Do The Groin Crunch Exercise
‘- Lie on your back, knees bent, feet flat, and ribs down. Lightly support the base of your skull with fingertips; keep elbows wide.
– Cross your right ankle over your left knee to form a figure‑four. Keep the left foot planted and pelvis level.
– Gently posteriorly tilt the pelvis to bring the low back into light contact with the floor. Brace the abdominal wall without holding your breath.
– Exhale as you curl head and shoulders off the floor, rotating your ribcage toward the left knee. Move from the ribs, not the elbows.
– Keep the chin slightly tucked, gaze up, and avoid pulling on the neck. Aim to lift the right shoulder blade off the floor.
– Pause briefly at the top with controlled tension. Inhale as you lower back down with the same control.
– Maintain a quiet pelvis; avoid yanking the knee toward the chest or lifting the planted foot.
– Return to start, then switch the ankle-over-knee position to train the other side.
Groin Crunch Tips
‘- Start with ribs down, feet flat, and knees bent before crossing the ankle over the opposite knee.
– Keep the pelvis level as you form the figure‑four with the ankle over the opposite knee.
– Gently tilt the pelvis posteriorly so the low back stays in light contact with the floor.
– Brace the abdominal wall while avoiding holding your breath.
– Initiate the crunch by bringing the ribcage toward the pelvis, not by pulling with the elbows.
– Exhale as you curl up and rotate the ribcage toward the planted knee side.
– Keep the chin slightly tucked, gaze up, and only lightly support the base of the skull with wide elbows.
– Aim to lift the shoulder blade on the crossed‑leg side off the floor while keeping the pelvis quiet.
– Avoid yanking the knee toward the chest or lifting the planted foot as you move.
– Pause briefly at the top, then inhale as you lower back down with the same control before switching sides.
Groin Crunch Beginner Introduction
The Groin Crunch is a simple, floor-based core move that uses bodyweight only, making it easy to slot into home or gym routines. It targets the abs and side abs, with the legs arranged in a relaxed figure‑four shape to help steady the hips and guide a gentle twist toward one side. Because the motion comes mainly from curling the upper body, it emphasizes careful bending of the spine rather than yanking with the arms or neck.
During each repetition, the chest subtly travels toward the pelvis and the upper back peels away from the ground while the lower back stays lightly grounded. The crossed‑leg position may create a slight opening sensation at the hip of the elevated leg, but the main effort remains in the core rather than the inner thighs. This controlled, short‑range curl-and-rotate style makes the exercise especially useful for practicing mindful torso movement, coordinated breathing, and stable hip and neck positioning without needing any equipment.