Imagine a group of young men, aged between 20 and 31. They embarked on a journey of running that lasted seven weeks. The aim was simple: to see if regular exercise could affect their mood and change the structure of their brain.

Scientists measured how much oxygen they could take in while running (VO₂max) at four key points: before the study began, after a two-week baseline, after the first three-week running cycle, and at the end of the seven weeks. They also kept track of their depression levels using the Center for Epidemiological Studies Depression (CES-D) Scale.

The results were encouraging. The young men could take in more oxygen by the end of the study, which meant their physical fitness had improved. Their depression scores also dropped, indicating they felt better.

But the real surprise came when they looked at the men's brains. Using magnetic resonance imaging (MRI), they discovered that the hippocampus, a crucial part of the brain involved in memory and mood, had grown in size. The growth was particularly noticeable in the left and right tail of the hippocampus after the first three-week run cycle.

These findings suggest that regular exercise can lead to positive changes in the brain, specifically in areas linked to mood regulation. This study offers a fresh look at how physical activity can have a profound impact on mental well-being.

Running and Happiness: A Brain Boost for Young Men

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