The human body needs daily physical movement, about 30 minutes. Of that its not possible, then once every two days we have to do sport or other physical efforts. The same happens on the brain level. It demands to be challenged with different tasks. When we learn, a certain part of our brain activates and the respective connections are improving their functions. If we accomodate our brain to be dynamic, then it will get to use less resources for the same activities. When we will be old, our mind will work the better the more we did sport. The level of intelligence from when we were kids also influences the brain's capacity to work at an old age, says the American Academy of Neurology. The experts have noticed the benefits is sport on elderly people and were surprised to discover a connection between the level of intelligence of the elderly people when they were young and the health of the lungs. Those who were smart as kids have healthier lungs at an old age. In time, people don't lose their cognitive identity and as a result their keep their capacities. Someone who wasn't good at chemistry will definitely not improve this knowledge when they are grown up or old. :)
