Crunches

Exercise Name: Crunches

Muscle Group: Rectus Abdominis

Video/Image: 

Description: This is the most common abdominal exercise and possibly the most often improperly performed. Here is how to perform it correctly.

Steps

Lie on your back with your feet up on a bench and your knees bent at a 90 degree angle.

Place your hands across your chest or on either side of your head (over your ears).

Raise your head, shoulders and chest off the floor and towards your knees, crunching your abs.

Hold the position for a moment and then lower to the starting position.

Tips

Keep your hips straight and your lower back against the floor during this exercise.

Source: 

- http://mrbret.net/beginner-workout-instructions/crunch-exercise-description/

- http://www.youtube.com/watch?feature=player_embedded&v=2yOFvV-NSeY

- http://gofitandhealthy.com/wp-content/uploads/2012/06/how-to-do-ab-crunches.jpg