By the way they DO have a lower than normal pulse rate--------------they have to have in order not to be detected on a lie-detector. I 'm surprised you didn't pick up on that one.
No they don't! The reason they can fool a POLYGRAPH, is because they don't get stressed under pressure. Nothing to do with a low blood pressure. I didn't pick up on it because it isn't true. Some will have lower blood pressure than others because they are fit, or in some cases ill.