A 30-45 minute aerobic exercise session can improve mood, prefrontal cortex function, and reaction time.

“So what do you get with the one-off? This is usually an aerobic-type exercise session, 30 to 45 minutes. What you get is that mood boost, very, very consistent. You get improved prefrontal function, typically tested with a Stroop test, which is a test that asks you to shift and focus your attention in specific ways. It's a challenging task and clearly dependent on the prefrontal cortex largely. And significant improvements in reaction time, so your speed at responding, often a motor kind of, but cognitive motor response is improved.”