The normal range of motion of your elbow from full extension to full flexion is 0 degrees to about 140 degrees. For most activities, you need a range of motion of 30 degrees to 130 degrees.

What is an illegal bowling action? An illegal bowling action is one in which the bowler's 'elbow extension' exceeds 15 degrees while he is in his delivery stride. The ICC set the 15-degree limit ...