PA-0286

Bicycle Crunch

Alternating Knee-to-Elbow Crunch

IntermediateCore FoundationsCore & Stability

At a glance

Opposite elbow and knee come toward each other in a pedalling rhythm in this lying core exercise. It works the obliques and the front of the abdomen together, and it is frequently performed too fast to be useful.

“Rotate the ribs toward the knee and keep the neck relaxed.”

Essence

The movement is a slow rotation of the ribcage toward a lifting knee, not a rapid pedalling of the legs. Done fast, it is a hip flexor drill with the neck pulling on the head. Done slowly, with the shoulder blade lifting off the floor and the opposite leg extending low, it is one of the most effective trunk exercises available.

Intention

To strengthen the abdominals and obliques with a slow, controlled alternating rotation.

What this pose develops

Physical

  • •Oblique and rectus abdominis strength
  • •Hip flexor control
  • •Coordination of opposite limbs

Mental

  • •Rhythm and attention
  • •Steady effort without rushing

Teaching concepts

  • •Cueing slow tempo and neck relief
  • •Spotting the pull on the neck

How to practise

  1. 1Lie on the back with the knees bent and the feet lifted, hands lightly behind the head.
  2. 2Lift the head and shoulders slightly off the floor and draw the lower belly in.
  3. 3Exhale, rotating the right shoulder toward the left knee as the right leg extends.
  4. 4Inhale through the centre, then exhale and rotate the left shoulder toward the right knee.
  5. 5Keep the movement slow and the extended leg at a height the low back can manage.
  6. 6Continue for 10 to 20 slow repetitions.

Alignment exploration

Instead of searching for the “correct” position, notice:

  • •Elbows stay wide, not pulled together in front of the face.
  • •Low back stays in contact with the floor.
  • •Hands support the head lightly without pulling the neck.
  • •Shoulder blade lifts off the floor with each rotation.

Breath

Exhale into each rotation and inhale through the centre. A steady breath keeps the pace honest.

Teacher’s eye

Listen for speed. A fast rhythm usually hides a pulled neck and a swinging pelvis. Watch the hands as well, which should support the head and not drag it.

Student practice

Reflect after practising:

  • •Slow down. Half the speed is twice the work.
  • •Keep the extended leg higher if the low back lifts.
  • •Rest the head on the floor between sets if the neck is tired.

Common movement strategies

Rather than mistakes, you may notice:

  • •Practise a stationary crunch with rotation first.
  • •Hold a small block under the head for support if needed.
  • •Keep the knees higher to shorten the lever.

Modifications

  • •Feet lowered to the floor between reps.
  • •Hands crossed on the chest.
  • •Head resting on the floor with a smaller rotation.

Props

Folded blanket (under the head)

Completion check

  • ✓Lower the head and feet and hug the knees to the chest.
  • ✓Rock gently side to side to release the back.

Related poses

Prerequisites

Dead BugWind-Removing Pose

Prepares for

Boat PoseRussian Twist

Complements

Double Leg LiftsHalf Boat

Counterposes

Wind-Removing PoseChild's Pose

Alternatives

Dead BugRussian Twist

Progressions

Slow bicycle with a longer lever

Regressions

Single knee-to-elbow crunch

Related movement concepts

Oblique rotationNeck-friendly crunch mechanicsTempo as the source of challenge

Search tags

coreobliquesintermediateneck-caution

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