Memory and Sports

This article showed that brief physical exercise enhances memory. It was shown by an experiment made with people aged from 50 to 80 years old some had memory deficits, an were without. They were asked to view some images, Immediately after that a part of the group were asked to ride a stationary bicycle for 6 minutes.
One hour later, the participants were asked to recall the images previously observed. It appeared that people who performed the exercise had a better recall than those who didn't do the activity,

The author explains these results in using biological components, it seems that Norepinephrine has increased after the exercise, and as a well known theory, Norepinephrine plays an important in memory.

The Sympathic Nervous System is aroused when someone is doing a physical activity such as sport. Strenuous exercise results in a massive activation of the sympathetic nervous system. This increase in catecholamine production plays a major in mediating the cardiovascular and metabolic responses to exercise... The activation of the SNS by exercise can be monitored by measuring the increase in plasma norepinephrine (NE)
(Greiwe; Hickner; Shah, Cryer, Holloszky 2011)

When the SNS is aroused Norepinephrine become activatd and increase in number.

Norepinephrine (NE) is a chemical hormones located in adrenal gland, it controls some metabolic proscess within the body. For example, it permit the release of O2 in muscles, or blood vessel dilation and constriction ad
These processes need to be processed when SNS is being aroused.
After doing sports the body needs to be restores to its original funtionning level to remain healthy. Norepinephrine work to return the muscles to a resting states, cal breathing, decrease heart rate and increase action of PNS by constricting blood vessels. It makes the body return to a state of homeostasis.

we first see the relation between doing physical exercise and the increase of Norepinephrine in the brain. Now we are...