It is a mechanical fact that to make something work, you have to exert a force of some sort – and it is equally the case that exerting a force on something can cause it to break. This is particularly the case if you exert the force to something that is not ready for it. This is true of car engines, of bridges and you had better believe it is true of the human body as well.
If you are planning to do rigorous exercises to build your abs, it is simply essential that you warm up before you do so. Warm-up exercises are seemingly inconsequential on the surface, as they do not make big demands on the body. But what they do is create a looseness that is essential in order to allow your body to perform more strenuous exercises.