"Physical fitness is not only one of the most important keys to a healthy body,

 is is the basis of dynamic and creative intellectual activity.

 the relationship between the soundness of the body and the activities of the mind is subtle and complex. 

much is not yet understood but we do know what the Greek's knew:

 that intelligence and skill can only function at the peak of their capacity

 when the body is healthy and strong" 

- John F. Kennedy

in my opinion and being completely honest here i really don't understand what this means i really don't I'm a bit confused but am going to try, so what i think this means is that physical fitness is important to be able to develop the basis of dynamic and creative intellectual activity now what that means is to be able to squeeze more like wanting to remember or learn something new not only does physical fitness help you but there is another thing to help with memory its called blueberries it said that they also help to advance memory not like telekinesis or some stuff no that's terrifying its just to help with your memory issues well it doesnt cure if you have had a bad injury with your brain or anything sadly it doesnt but if you just want a boost on your memory then yeah i was meaning that