How do I know if a player is lying or not? How to achieve this kind of game, the player does the opposite?

In poker, anything can happen because it’s a great game and these things are easy to explain, but it is not so easy to achieve this, professional players are accustomed to this kind of competence for two things.
First of all that for years he put into practice and not a matter of two days ago because most people think, and the second is that it takes much time to study not only the game but more importantly, shares how certain reflexes and actions of human beings in situations of high pressure or tension.
When a player is tense because he has good hands and does not know how to control the reflex actions are performed several times in the face they not realize May, eyes, mouth, rapid breathing, much we do not know sometimes that the control and professional players are informed.
This is why experienced players know almost every move we make, if we are lying or not.
It is therefore recommended that if this game at a table where you are a professional, retire and play at other tables to learn more as you see other players play at our level and then if you feel better prepared and with a bit more knowledge and experience back to see if it will.