A study by the University of Reims Champagne-Ardenne in France found that light exercise, such as a brief jog, boosts cognitive function more effectively than resting for the same duration. This enhancement in brain function is attributed to an increase in energy and mood improvement following exercise. Surprisingly, the study also discovered that relaxation could significantly decrease energy and mood, contrary to expectations.
  

Key Points 

1. Exercise Over Rest for Cognitive Boost: The study emphasizes that light exercise, like a quick jog, is more beneficial for cognitive function than resting for an equivalent period.
2. Mood and Energy Link: The improvement in cognitive abilities post-exercise is linked to an increase in feelings of energy and an uplifted mood.
3. Unexpected Findings on Relaxation: Contrary to common beliefs, the study found that relaxation can lead to a decrease in energy and mood, impacting cognitive performance negatively.
4. Methodology of the Study: Participants underwent cognitive tests and mood assessments before and after being randomly assigned to either exercise or rest for 15 minutes.
5. Outcome of Exercise on Cognitive Tests: Participants who exercised showed improved results in cognitive tests, aligning with their increased mood and energy levels.

Source: https://qz.com/quartzy/1413808/heres-what-a-brief-jog-can-do-for-your-brain