Title is a little misleading; from the article: “Our data showed that, rather than actually increasing the size of the hippocampus per se, the main ‘brain bene

Title is a little misleading; from the article: “Our data showed that, rather than actually increasing the size of the hippocampus per se, the main ‘brain benefits’ are due to aerobic exercise slowing down the deterioration in brain size. In other words, exercise can be seen as a maintenance program for the brain" Though, the article also says: "Overall, the results – published in the journal NeuroImage– showed that, while exercise had no effect on total hippocampal volume, it did significantly increase the size of the left region of the hippocampus in humans." It's a meta review of other articles, with all the caveats such meta reviews come with.