If you find yourself nodding off each day after lunch…Forget trying to get an energy boost from Starbucks or RedBull. Take a walk, instead!

Researchers at the University of Birmingham discovered that people who took a short, leisurely walk during their lunch hour got a significant mood boost, had longer attention spans, and were better able to fend off work-related stress than those who consumed caffeine – and the change lasted for several hours. That’s because walking increases oxygen flow to the brain, and boosts the production of energizing, feel-good brain chemicals.