There are different types of abs crunches. If you do them regularly along with a proper diet, you can develop nice six packs. The basic crunch normally helps to work the upper area of the abdomen. To do this exercise, you have first to lie down on your back, bend your knees and place the feet on the floor. The feet have to come near the hips and this will provide support to the lower back. While in this position, place your right hand to the left shoulder and your left hand to the right shoulder such that the hands cross over your chest.

Slowly raise the upper part of your body while simultaneously pressing the lower back against the floor. Slowly exhale when you reach at the peak of the crunch and inhale as you lower your back slowly. Repeat this exercise for about 20 to 25 times and take a break of one minute. Three to four sets a day are sufficient.

The reverse crunch normally helps to work the lower portion of the abdominal. To do this exercise, you need to first lie down on your back and place your hands straight along with your body. The hands should touch the floor.

With your back and head straight, slowly raise your legs and slightly bend your knees and cross the legs. Raise your hips for about two inches and while in this position, perform abs crunches. Lower your hips slowly back and try more repetitions. Do 20 to 25 sets a day and remember to take a one minute break.