Being more aerobically fit was associated with greater elasticity, improved microstructure of hippocampus accounting for improved memory
www.sciencedaily.com
From the article:
To determine why more aerobically fit individuals have better memories, scientists used magnetic resonance elastography (MRE), which measures the elasticity of organs, and found that fit individuals had a firmer, more elastic hippocampus—a region of the brain associated with memory.