Standing Desks and Hunter-Gatherers

I recently started using a standing desk and found it increases my productivity perhaps because my mostly caveman brain “thinks” that I will usually stand when facing cognitively challenging tasks, but I will sit when I want to relax and save energy.

Are there other ways we can attempt to increase our cognitive powers by taking into account that many of the genes which influence human emotion and cognition were selected for to make our ancestors better hunter-gatherers?

Edited because of Reisqui’s comment.