A new study out of the University of Illinois Urbana-Champaign found that the children who could run for longer periods of time on the treadmill had thinner sections of gray matter in the front of their brains (which actually signifies more brain maturation) than those with lower stamina. These children also performed better on a math test.
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0134115
http://www.cnn.com/2015/08/31/health/fit-kids-better-math/
