“Blue light (i.e. that stuff that streams out of your computer and phone screens) boosts your convergent thinking ability while walking increases your divergent thinking ability.”
In order to be creative you need to tap into two different types of thinking: Convergent thinking, which is the process of evaluating and organizing ideas, and divergent thinking, which is the process of generating and exploring ideas.
Jocelyn K. Glei explains that these two types of thinking are triggered by different activities and therefore it’s impossible to be creative without moving your body, because divergent thinking is triggered by movement.