45 Degree Bicycle Twisting Crunch
45 Degree Bicycle Twisting Crunch Exercise Description
The bicycle twisting crunch is a bodyweight trunk flexion-with-rotation exercise targeting the rectus abdominis and the external/internal obliques, with assistance from the hip flexors during leg movement. It teaches coordinated ribcage rotation while maintaining lumbar stability, helping you control pelvic position under dynamic leg motion. You’ll lift the shoulder blades from the floor and rotate through the thoracic spine, bringing one shoulder toward the opposite knee as the other leg extends. The goal is precise rotation and controlled “pedaling,” not speed. Keep the elbows wide, the gaze up, and the lower back gently pressed toward the floor to minimize excessive lumbar extension.
- Muscle Groups: Abs, Obliques, Waist
- Target Muscles: External Obliques, Internal Obliques
- Assisting Muscles: Rectus Abdominis
- Stabilizing Muscles: Multifidus, Quadratus Lumborum, 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: Male
How To Do The 45 Degree Bicycle Twisting Crunch Exercise
‘- Lie supine. Hands lightly support the head (fingertips by ears), elbows wide; bring hips and knees to 90/90 (tabletop).
– Brace the abdominal wall and gently press the lower back toward the floor (posterior pelvic tilt).
– Lift shoulder blades off the floor; keep neck long and chin slightly tucked.
– Extend the right leg as you draw the left knee toward the chest.
– Rotate the ribcage to bring the right shoulder toward the left knee; lead with the shoulder, not the elbow.
– Pause briefly with control. Keep pelvis level and lower ribs down.
– Switch: extend the left leg, draw the right knee in, and rotate the left shoulder toward the right knee in a smooth, continuous rhythm.
– Keep the extended leg low but off the floor; if the low back wants to arch, raise the extended leg higher.
– Breathe steadily—exhale during each twist, inhale as you transition.
– Avoid tugging the head, collapsing the elbows inward, rushing the movement, or letting the low back lift off the floor.
45 Degree Bicycle Twisting Crunch Tips
‘- Bring hips and knees to 90/90 (tabletop) before you start.
– Lightly support your head with fingertips by your ears and keep the elbows wide.
– Gently press your lower back toward the floor to maintain a slight posterior pelvic tilt.
– Lift the shoulder blades off the floor while keeping the neck long and chin slightly tucked.
– Rotate from the ribcage to bring the shoulder toward the opposite knee; lead with the shoulder, not the elbow.
– Keep the pelvis level and the lower ribs down as you twist.
– Keep the extended leg low but off the floor; if your low back wants to arch, raise the extended leg higher.
– Move in a smooth, continuous rhythm, focusing on precise rotation and controlled “pedaling,” not speed.
– Pause briefly with control at each twist before switching sides.
– Breathe steadily—exhale during each twist and inhale as you transition.
– Avoid tugging on your head, collapsing the elbows inward, rushing the movement, or letting the low back lift off the floor.
45 Degree Bicycle Twisting Crunch Beginner Introduction
The bicycle twisting crunch blends a cycling-style leg action with a rotating curl for a challenging core exercise using only bodyweight. It centers on the abs and side abs, with the hip flexors helping as the legs move. As the upper back lifts from the ground and the chest turns, one shoulder travels toward the opposite knee while the other leg reaches long, creating a crisscross pattern that feels like slow-motion pedaling in the air.
This move highlights upper-spine rotation while the lower back and pelvis stay steady, encouraging strong control through the mid-section rather than relying on momentum. The elbows remain open, the eyes look upward, and the neck stays long so the effort comes from the core instead of the head or arms. A smooth, continuous rhythm—paired with calm, regular breathing—supports precision in each twist and extension, turning a familiar “bicycle” motion into a focused, stability-driven ab exercise.