One leg straight, the other to the chest
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Bicycle crunch

Lying with the shoulders lifted you bend one knee to the chest while the other leg stays straight above the floor, alternating. A classic for the obliques and abs.

Level
Start
Equipment
No equipment
Measure
reps
Tempo
1-0-1-0 (down, pause, up, pause)
corehip flexors

Technique

  1. Shoulders off the floor, hands by the ears, lower back into the floor.
  2. Pull the knee in and rotate the trunk toward it, the other leg straight a few centimetres off the floor.
  3. Slow and even, breathe with the switches.

Common mistakes

  • Pulling the head with the hands.
  • The straight leg dropping to the floor.
3D model of a push-up with working muscles highlighted 3D model of a push-up with working muscles highlighted

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Progression

This exercise

Bicycle crunch

No equipment reps

Same muscles