If you’re struggling to work or study, or just in a bad mood, consider doing an easy workout. In a new study published in the journal Scientific Reports, Japanese researchers used brain imaging to study adults at rest and after a short run. They found that only 10 minutes of moderate intensity running improves both mood and executive functions of the brain. They observed that running increased blood flow to the prefrontal cortex that controls mood and executive functions, like attention, memory, planning, organization, and impulse control. Given that running requires no extra equipment other than running shoes, it might be an easy way to improve your health, your brain, and your mood.