Changes by individuals to their diet and their physical activity can increase life expectancy. There is a reliance today on the consumption of processed foods, which have a high fat and sugar content. By preparing their own foods, and consuming more fruit and vegetables, people could ensure that their diets are healthier and more balanced, which could lead to a reduction in obesity levels. In order to improve fitness levels, people could choose to walk or cycle to work or to the shops rather than taking the car. They could also choose to walk up stairs instead of taking the lift. These simple changes could lead to a significant improvement in fitness levels.