Why should aerobic fitness matter to the brain? Exercise keeps the heart strong and blood vessels open, which in turn ensures that brain cells get all the nutrients they need for peak performance. That's critically important to brain function.
Use it or lose it' about the body. The same advice goes for the brain. More and more research, in fact, shows that a combination of mental and physical activities can protect your memory and help keep you alert.
Although neurons make up only 2% of total body weight, they use one quarter of all the glucose and oxygen the body takes in. A vigorous workout also triggers parts of the brain related to movement and balance, which can keep neuron connections strong.
With age, many people begin to experience problems coming up with names or numbers. The memory is there. It just takes people longer to retrieve it.