Twist Crunch (Leg-Up)
Twist Crunch (Leg-Up) Exercise Description
Twist Crunch (leg-up) is a bodyweight abdominal exercise that blends spinal flexion with trunk rotation to emphasize the obliques while also training the rectus abdominis. Elevating the legs to a tabletop position (hips and knees at roughly 90 degrees) increases the stabilization demand on the anterior core and helps you focus the motion through the ribcage. Each repetition is a small, controlled curl that lifts the shoulder blades from the floor and rotates the ribcage toward the opposite knee—led by the shoulder, not the elbow. Maintain a gentle posterior pelvic tilt so the low back stays in light contact with the floor and the hip angle stays steady. The priority is clean mechanics: smooth breathing, neutral neck alignment, and deliberate control rather than chasing elbow-to-knee contact.
- Muscle Groups: Abs, Obliques, Waist
- Target Muscles: External Obliques, Internal Obliques
- Assisting Muscles: Rectus Abdominis
- Stabilizing Muscles: Multifidus, Psoas Major, Rectus Femoris, Transversus Abdominis
- Body Area: Upper Body
- Body Parts: Core
- Body Surface: Side
- Body Symmetry: Unilateral
- Equipment: Bodyweight
- Exercise Patterns: Other
- Exercise Type: Strength
- Functional Grouping: Trunk Lateral Flexors, Trunk Rotators
- Joint Involvement: Multi-joint
- Muscle Location: Deep Side Abs, Side Abs
- Movement Direction: Rotational
- Muscle Position: Lateral
- Gender: Female
How To Do The Twist Crunch (Leg-Up) Exercise
‘- Lie supine. Raise legs to tabletop; shins parallel to floor; feet together.
– Posteriorly tilt the pelvis to lightly press the low back into the floor.
– Place fingertips lightly at temples (or arms crossed on chest). Elbows stay open.
– Set the neck neutral (small chin nod). Eyes toward the ceiling.
– Brace the abdominal wall—draw ribs down without holding the breath.
– Exhale, curl the shoulder blades off the floor, then rotate right shoulder toward left knee.
– Lead with the shoulder, not the elbow; keep elbows wide and neck relaxed.
– Keep knees stacked over hips; avoid swinging or changing the hip/knee angles.
– Inhale and lower the torso with control to the start position.
– Repeat to the other side, matching range and control on both diagonals.
Twist Crunch (Leg-Up) Tips
‘- Raise your legs to tabletop with hips and knees at about 90°, shins parallel to the floor, and feet together.
– Gently posteriorly tilt your pelvis so your low back stays in light contact with the floor.
– Keep your knees stacked over your hips and avoid swinging or changing your hip and knee angles.
– Place your fingertips lightly at your temples (or cross your arms over your chest) and keep your elbows open.
– Set your neck neutral with a small chin nod and your eyes toward the ceiling.
– Brace your abdominal wall by drawing your ribs down before you start curling.
– As you exhale, curl your shoulder blades off the floor, then rotate your right shoulder toward your left knee (and alternate sides).
– Lead the rotation with your shoulder, not your elbow, and keep the elbows wide.
– Inhale as you lower your torso back to the start position with control.
– Use small, controlled curls and focus on matching range and control on both sides rather than trying to touch elbow to knee.
Twist Crunch (Leg-Up) Beginner Introduction
Twist Crunch (leg-up) is a bodyweight core movement that blends a classic curl with a gentle twist to spotlight the side abs while also challenging the front of the mid‑section. With the legs lifted and bent at right angles, the core works harder to steady the hips so the motion centers on the upper body rather than the lower half. This creates a demanding but compact ab exercise that emphasizes precision more than big, dramatic reps.
During the exercise, a person lies on the back with the shins roughly parallel to the floor while the upper body performs a short crunch and turns the ribcage toward the opposite leg. The shoulders guide the rotation, while the elbows simply frame the head. A light tuck of the hips encourages the lower back to stay gently in contact with the ground and the angle at the hips and knees remains consistent. Smooth breathing, relaxed neck muscles, and matching effort on both diagonals highlight the controlled, technical nature of this rotational crunch.