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 obliques while the hip flexors assist to cycle the legs. Performed supine with the shoulder blades lifted, you rotate the ribcage to bring the opposite shoulder toward the bent knee as the other leg extends, maintaining controlled breathing and spinal position. Keeping a gentle posterior pelvic tilt (lower back lightly “imprinted” on the floor) helps limit lumbar extension so the abdominal wall drives the movement rather than momentum. The goal is crisp thoracic rotation with stable hips and a neutral cervical spine—elbows stay wide and the hands only support the head, not pull it. Executed smoothly, it trains rotational core control, coordination, and endurance of the anterior trunk.

Muscle Groups: Abs, Core, Obliques, Waist
Target Muscles: External Obliques, Rectus Abdominis
Assisting Muscles: Internal Obliques
Stabilizing Muscles: Multifidus, Sternocleidomastoid, 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: Female

How To Do The Lying Bicycle Crunch Exercise

‘- Lie on your back; hands lightly by your temples or behind ears, elbows wide (do not pull the head).
– Bring hips and knees to 90/90 (tabletop). Brace the abdominal wall.
– Posteriorly tilt the pelvis so the lower back rests lightly on the floor.
– Lift shoulder blades off the floor; keep the neck neutral with a gentle chin tuck.
– Extend the right leg to about 30–45 degrees without letting the low back lift.
– Rotate your ribcage, bringing the left shoulder toward the right knee; think “armpit to knee,” not elbow to knee.
– Pause briefly with control; keep elbows wide and shoulder blades elevated.
– Switch sides smoothly through center, maintaining the pelvic tilt and steady torso.
– Breathe rhythmically: exhale as you rotate; inhale during the transition.
– If the low back starts to arch, shorten the leg reach or reset the pelvic tilt.
– Lower feet and shoulders to the floor with control to finish.

Lying Bicycle Crunch Tips

‘- Keep your elbows wide so you avoid pulling your head with your hands.
– Maintain a gentle posterior pelvic tilt so your lower back stays lightly on the floor.
– Lift your shoulder blades off the floor and keep the neck neutral with a gentle chin tuck.
– Brace the abdominal wall before you begin extending and cycling the legs.
– Extend the working leg only to about 30–45 degrees without letting the low back lift.
– Rotate your ribcage, thinking “armpit to knee” rather than trying to touch your elbow to the knee.
– Pause briefly in the rotated position with control while keeping the shoulder blades elevated.
– Switch sides smoothly through the center, maintaining the pelvic tilt and a steady torso.
– Breathe rhythmically, exhaling as you rotate and inhaling during the transition.
– If your low back starts to arch, shorten the leg reach or reset your pelvic tilt.

Lying Bicycle Crunch Beginner Introduction

The lying bicycle crunch is a bodyweight core exercise performed on the floor that combines a pedaling leg motion with a turning movement through the upper body. It emphasizes the abs and side abs, with the hip flexors helping to drive the cycling action of the legs. The upper body stays lifted from the ground while the ribcage rotates so one shoulder moves toward the opposite bent knee as the other leg lengthens away. Throughout the motion, the lower back stays gently connected to the floor so the front of the torso, rather than swinging or jerking, powers the work.

This exercise highlights smooth, rhythmic breathing, steady neck alignment, and controlled rotation through the upper back while the hips remain stable. Elbows remain wide and the hands simply cradle the head instead of pulling it, which helps reduce strain on the neck and keep the twist coming from the torso. When performed with consistent form, it develops coordinated core movement, twisting strength, and endurance through the front of the midsection.