Amazingly, when we're under pressure, our body reacts the same way it did thousands of years ago, when our early ancestors were in danger: the 'Fight or Flight'' response. This is when our brain releases chemicals that give us extra strength and speed, so that, in any dangerous situation, we can either stay and fight, or run away. This is called a 'stress response', and it can be pretty useful. It doesn't just help you escape from dangerous situations, it also comes in handy if you're competing in a sporting event, have an important deadline to meet at work, or are taking an exam. However, the problem is, when we find ourselves in a situation that causes us stress on a regular basis for example worrying about our job, money, family or relationship our brain still produces these 'Fight or Flight'' chemicals.