Abdominal muscle is different from regular muscle.
Your abdominal muscles are just like every other muscle in your body. The abdominal is different only in location and unlike biceps or quads they don’t rest on a bony surface. So you should train them the same way you would train, say, your biceps or your chest. The basic laws of physiology apply to all your muscles, including your abs. This means that you have to do exercises in the correct plane of movement to effectively work the muscle.
You have to train your abs everyday.
The rules of weight training state that you should give your muscles at least, a day of rest to recover and this applies to your abs as well. Instead of working your back everyday, do them every other day or even just three times a week. They need a break just like the rest of your body. The trick is to train them hard.
Doing ab exercises gets rid of abdominal fat.
There is no such thing as spot reduction. People assume that if you have fat deposits on your abdominal, exercising the muscles underlying the fat will make it go away. But they assume wrong. You can’t get rid of the fat over a muscle by repeatedly exercising that body part. The only way to burn fat from your tummy is through prolonged exercise and a healthy, low calorie diet.
High repetitions are required to make gains.
As you’ve read earlier, abs are just like every other muscle in your body. That means, you should train your abs the same way as the rest of your muscle groups. To make strength gains with your abs, you have to overload your muscles.