will allow us to improve health , we find , according to the WHO , four aspects that have a direct impact on people and that could be regulated by city planning , the urban environment being a fundamental factor that will establish the different access routes to alcohol consumption , tobacco , and likewise to food and physical activity .
It is clear that both alcohol and tobacco should be regulated by means of regulations that limit their consumption , but we are left with the question of integrating into this urban planning the guarantee of an adequate diet , or rather access to a healthy diet , as well as the conditioning factors that will encourage an active lifestyle based on the practice of a minimum of physical exercise that minimizes sedentary habits .
In this way , we can consider the active city from the perspective of the lifestyles that each city offers its citizens .
Why are active cities necessary ? Or , in other words , why is it necessary to transform cities into active ones ?
Returning to this need indicated by the WHO , the active city on a global scale is necessary due to the increase in obesity worldwide , mainly in developed countries . The cause of this would be the sedentary lifestyle caused by the lifestyle that incites us or conditions the current cities .
The increasingly less compact urban design and dispersed urbanizations in which the dependence on motorized vehicles makes the daily routine a low energy expenditure and likewise all daily activities are based on minimizing effort . We add here a society marked by the time factor , or rather speed , we find that in addition to the eight working hours we add a large number of hours of passive leisure , i . e . unhealthy activities .
In this urban space-time relationship in which we are encouraged to go faster in all senses , the need to reflect on the distances and rhythms that we must acquire to meet professional or rather consumer needs appears . We take as an example the phenomenon of the 15-minute city proposed by Carlos Moreno , professor at the Sorbonne University , for the city of Paris , based on this vision of chrono-urbanism .
In a more compact city , closer as he indicates with all daily needs covered within a 15-minute ra-
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