1. 1

   Lie down on the floor placing your feet either under something that will not move or by having a partner hold them. Your legs should be bent at the knees.

2. 2

   Place your hands behind your head and lock them together by clasping your fingers. This is the starting position.

3. 3

   Elevate your upper body so that it creates an imaginary V-shape with your thighs. Breathe out when performing this part of the exercise.

4. 4

   Once you feel the contraction for a second, lower your upper body back down to the starting position while inhaling.

5. 5

   Repeat for the recommended amount of repetitions.

General guidance matched from movement type and equipment; it is not individualized coaching or medical advice.