When we are going to realise an important effort, physical or intellectual, our body is prepared for the action, intensifies the production of substances that activate the organism and creates a general alert status that it allows us to render to the maximum and with the greater success in the task at issue. An example, from the point of view of the physical effort would be an athletic test or a flight before a real danger and from the intellectual point of view an examination or a conference or to char it. In these cases our thoughts and emotions prepare to carry out the task to us positively of suitable form: the beats of the heart are accelerated, it increases the rate respiratory, and a species of corporal tension is created, unequivocal signs of the preparation necessary to confront that situation as well as possible. In this case, there is an agreed and adapted answer to which the situation demands to us. However, if instead of to find us before that real situation of action, the symptoms or signals before described (heart, breathing, tension) they suddenly appear, when our thoughts anticipate, they create or they imagine a possible situation of danger, increasing in addition in intensity as raises the imagination degree or anticipation of the same, we can be found in a situation very different from the previous one: we feel, for example, that accelerates the heart, fear sensation enters to us that makes increase that heart rate and as well accelerates our respircin, it does that nuestos thoughts of which something goes amla they seem to be in the certain thing and so we entered a vicious circle that the people that they have had sometimes an anxiety attack know very well. All we have a degree of own and personal activation that we know like anxiety characteristic, that is to say, the normal state of activation that our organism uses in the day to day.