Smart exercises

Brain-derived neurotrophic factor also known as BDNF is a protein, which in humans is encoded.
It acts on certain neurons of our nervous system, helps to support the survival of existing neurons and encourage the growth of new neurons and synapses. In the brain, it is active in the hippocampus, cortex, and basal forebrain—areas vital to memory, learning and higher thinking.
BDNF itself is important for long-term memory.
 

Although the vast majority of neurons in the mammalian brain are formed before birth, parts of the adult brain retain the ability to grow new neurons from neural stem cells in a process known as neurogenesis. Neurotrophins are chemicals that help to stimulate and control neurogenesis, BDNF being one of the most active.

Mice born without the ability to make BDNF suffer developmental defects in the brain and sensory nervous system, and usually die soon after birth, suggesting that BDNF plays an important role in normal neural development.

Exercise has been shown to be the only way to increase the secretion of BDNF, so sport yourself smarter.