How to perform kick down crunches properly:

  • Lie flat on the floor with the lower back pressed into the ground.
  • Fingers at the temples, feet and shoulders slightly lifted from the ground.
  • Engage the core and in one movement lift the upper body and the knees into the chest so that the knees and elbows almost touch.
  • Keep looking forward and do not let the chin rest on the chest as this will hurt your neck.
  • Pause for a moment then return back to the starting position.

Video lecture: