The best ab exercises are crunches, which are great for getting a muscular stomach, by isolating these key core muscles that help with stability and posture.
However some people have the misconception that doing abdominal exercises on their own will give you a flat stomach. This is not true and can in fact increase the size of your stomach, because you will be building muscle underneath all the fat, which will give the appearance of a larger belly. You should only do these exercises once you have attained a flat stomach or are cutting down your tummy fat by doing aerobic exercise.
The stomach exercises are pretty simple to grasp and the more repetitions you do the better, unlike other muscle groups. Although, you shouldn’t overdo it so take it one step at a time (don’t do 100 crunches on your first day).
You should also always stretch after doing them, because otherwise you will have a very sore tummy, even if you take protein supplements due to Delayed Onset Muscle Soreness (DOMS).