Here is a video of an exercise called “Stir the Pot.” It is a great core exercise that allows you to keep a neutral spine. There are two variations in the video, one is done on the knees (which is a bit easier) and the other is on the feet. There are plenty of variations of this exercise, feel free to modify it to your fitness level. The movement is simply done by going clockwise and then counterclockwise. Keep your core tight and focus on feeling the movement in your abs.

[youtube http://www.youtube.com/watch?v=ZIzCi8dn6RU]