ABSTRACT
The improvement of social conditions among the population led to an increase of the number of individuals with overweight and obesity. From the worldwide statistics it is possible to see that obesity has more than doubled since 1980 and, actually, more than 1.4 billion adults have overweight (WHO 2012). In Portugal, statistical data show that more than 50% of all population has, at least, an unhealthy weight (INE 2010). Therefore, it is likely that obese people represent already a significant fraction of the workforce.
