Regular swimming has been shown to improve memory, cognitive function, immune response and mood. This complements studies in mammals where brain-derived neurotrophic factor is known to increase neuronal spine density. The team then tested the rats’ memory by having them swim through a radial arm water maze containing six arms, including one with a hidden platform. Kids get a boost from swimming tooThe brain-enhancing benefits from swimming appear to also boost learning in children. This shows a clear cognitive benefit from swimming versus anaerobic exercise, though the study does not compare swimming with other aerobic exercises.