A frequently used core stabilization exercise is the Plank-exercise. If you haven’t been exposed to it previously I will give a short description: The individual is supposed to lie on the floor face down supporting the body on the elbows and toes. Tensing the abdominal wall to keep the body straight like a plank is said to strengthen the core and there has even evolved a core stabilization test out of this exercise. The test a timed challenge where the ability to remain in this position for a certain period of time is used to evaluate core-strength. One method of evaluating the plank test is a straight time trial in stationary plank position. Another version of testing includes the lifting and holding of limbs for certain periods of time in a specific pattern. Both these testing methods are using quantitative measurements to evaluate core strength. There is never any mentioning of proper joint position, neutral spine, good stabilization patterns and evaluation of breathing. Of course it will exercise the abdominal wall but I do not consider it to be a good core-exercise.
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