Every person belives that he lived in the best period. 20 years ago, outputs consist of entertainment with friends, socializing directly with people, conversation remotely using letters. However it is because the tehnology was not developed. This can be consider an advantage because human relationships took place face to face, not like today, using mobile phones, emails or social networks. This is why health degradation from an early age due to hours spent at the computers, video games, sedentary and unhealthy food. Unfortunately this phenomenon is it constant ascent.