Crunch

The crunch exercise is the most well known abdominal exercise which can be performed at all levels of strength and experience.

Teaching points

  • Lay on your back with the knees bent.  
  • Place your hands behind your neck (don't pull your neck forwards).
  • Lift the head, neck and shoulders off the ground and slide your hands up, towards your knees.  
  • Try to keep the same gap between your chin and chest to avoid straining the neck.  
  • Slowly return to the start position.  

Variations & progressions

  • Position your hands on your thighs and reach up to your knees.  

Muscles worked

  • Rectus abdominus.  
  • Transversus abdominus.

Alternative exercises

  • Crunch on a swiss ball.  
  • Crunch using a resistance band.
  • Twisting crunch.
  • Reverse crunch.  
  • Crunch resistance machine.

Related injuries

  • Abdominal strain.
  • Lower back pain.