Lying Bicycle Crunch
Lying Bicycle Crunch Exercise Description
The lying bicycle crunch is a bodyweight trunk flexion-and-rotation exercise that targets the rectus abdominis and external/internal obliques while the hip flexors assist leg movement. Performed with the shoulder blades lifted and the low back gently anchored to the floor, it trains coordinated rotation through the thoracic spine with controlled pelvic positioning. Alternating knee drives and leg extensions create a contralateral pattern that challenges core stability as the torso rotates. Keeping a light hand contact behind the head and wide elbows helps maintain a neutral neck and prevents pulling. Used with precise control and a consistent breathing pattern, this variation emphasizes abdominal activation, rotational control, and spinal alignment throughout the range of motion.
- Muscle Groups: Abs, Core, Obliques, Waist
- Target Muscles: External Obliques, Rectus Abdominis
- Assisting Muscles: Internal Obliques
- Stabilizing Muscles: Multifidus, Transversus Abdominis
- Body Area: Upper Body
- Body Parts: Core, Torso
- Body Surface: Front, Side
- Body Symmetry: Unilateral
- Equipment: Bodyweight
- Exercise Patterns: Other
- Exercise Type: Strength
- Functional Grouping: Trunk Flexors, Trunk Lateral Flexors, Trunk Rotators
- Joint Involvement: Multi-joint
- Muscle Location: Side Abs, Stomach
- Movement Direction: Rotational
- Muscle Position: Anterior, Lateral
- Gender: Male
How To Do The Lying Bicycle Crunch Exercise
‘- Lie on your back; hands lightly cradle the head, elbows wide (do not pull).
– Bring hips and knees to 90/90 (tabletop). Gently posteriorly tilt the pelvis so the low back contacts the floor and ribs stay “down.”
– Curl the head, neck, and shoulder blades off the floor using the abdominals; keep a fist-sized space under the chin and eyes toward the ceiling.
– Extend the right leg on a low diagonal without letting the low back arch.
– Simultaneously rotate the ribcage to the left, bringing the right shoulder toward the left knee (think “armpit to knee,” not elbow to knee).
– Switch: draw the right knee in, extend the left leg, and rotate the ribcage to the right.
– Move smoothly from the trunk; keep the pelvis steady and the low back anchored throughout.
– Keep elbows wide and neck long; hands provide support only.
– Limit leg reach to the distance you can maintain back contact with the floor.
– Breathe: exhale with each curl/rotation; inhale during the transition to the other side.
– Lower the torso with control to finish, releasing the pelvic tilt only at the end.
Lying Bicycle Crunch Tips
‘- Before you start, gently posteriorly tilt the pelvis so the low back contacts the floor and ribs stay “down.”
– Keep the head, neck, and shoulder blades curled off the floor using the abdominals, with a fist-sized space under the chin and eyes toward the ceiling.
– Extend each leg on a low diagonal only as far as you can without letting the low back arch off the floor.
– As you rotate, think “armpit to knee” to guide the ribcage toward the opposite knee instead of pulling the elbow across.
– Move smoothly from the trunk, keeping the pelvis steady and the low back anchored throughout.
– Keep the hands lightly cradling the head with elbows wide so they support without pulling on the neck.
– Maintain a long neck by keeping the elbows wide and avoiding tucking the chin toward the chest.
– Use a consistent breathing pattern: exhale with each curl and rotation, inhale during the transition to the other side.
– Alternate knee drives and leg extensions in a controlled, contralateral pattern to maintain core stability as the torso rotates.
– To finish, lower the torso with control and release the pelvic tilt only after your back is fully on the floor.
Lying Bicycle Crunch Beginner Introduction
The lying bicycle crunch is a bodyweight core exercise performed on the floor that blends bending and twisting of the trunk. With the back resting on the ground and the upper body curled slightly upward, the abs and side abs take the main workload, while the hip flexors contribute to the cycling leg action. One leg lengthens on a low angle as the other knee lifts, and the upper body turns so the opposite shoulder moves toward that bent leg. This alternating pattern trains the upper spine to rotate while the pelvis stays organized and steady.
Hand placement and breathing play a big role in this variation. The fingertips rest gently behind the head with the elbows open, so the neck stays long and relaxed rather than being tugged. Smooth, steady breaths are matched to each twist, supporting tension through the midsection and helping the spine move in a controlled way. Overall, the exercise highlights precise core engagement, careful rotation, and a stable back position from side to side.