Exercise Keeps Older Brains in Shape

Vocabulary, verbal memory and spacial and associative reasoning reach peak performance between the ages of 40 and 56. Ernst Pöppel says young and old brains show very little difference. So there's no reason they can't function optimally a whole life long - provided they're kept in shape like muscles. They can even grow new brain cells. The neuro-networks and transmitters, on the other hand, can get a bit rusty with age.