Great. So if you run a lot (long distance cardio), you get a marked increase in new brain cells. What brain cells? The part of the nervous system that regulates (wait for it) breathing and metabolism.

No kidding.

This is like the study [citation missing] that showed a huge increase in brain cell generation for seniors playing wii fit ... in the area of the brain that regulated fine motor skills.

The "Brain" is not a general-purpose computing resource. Until someone can show that these skill-specific increases can translate to IQ or (better) improved long-term creativity and happiness, take them with a grain of salt.