Exercising: your Heart and Brain


Okay … this isn’t so much about genetics or biotech, but these articles are ones I came across and said “wow, I have to tell people about this” — so here it is!

These articles discuss the scientific reasons why going to the gym makes you feel more alert, and how cardiovascular exercise helps your heart.

The first study shows a correlation between exercise and better results on memory tests. The study done by the Columbia University Medical Center explains specifically what exercise does within the brain:

This finding is significant because it was accomplished via the first-ever observation of neurogenesis, the growth of neurons, within a living brain. Using an MRI imaging technique developed at Columbia, the researchers were able to identify neurogenesis within the dentate gyrus region following exercise.

“No previous research has systematically examined the different regions of the hippocampus and identified which region is most affected by exercise,” said Scott A. Small, M.D., associate professor of neurology at Columbia University Medical Center and the study’s lead author.

See more at: New Reason To Hit The Gym: Fighting Memory Loss (ScienceDaily)

The second study, also from the Columbia University Medical Center shows that aerobic exercise is good for the heart, but why? Here is what they found:

Whole blood samples were taken from 46 healthy young adults (20-45 years old) both before and after participating in moderate or high intensity aerobic exercise, over a 12-week period.

The blood samples were stimulated with the infectious agent lipopolysaccharide (LPS) – gram negative bacteria – and then analyzed for levels of tumor necrosis factor (TNF) – an initial step in the inflammatory cascade. Substantially lower levels of TNF were found after aerobic training, in both the moderate and high intensity groups.

“These findings suggest strongly that exercise reduces the systemic inflammation that can lead to heart disease,” said Dr. Sloan. “This study is especially significant because the value of exercise has never before been shown in TNF, and never in healthy adults who were not at high-risk for heart disease.”

See more at: Why Aerobic Exercise Is Good For The Heart (ScienceDaily)

Is Your Memory Erased While You Sleep?


“The authors speculate that memories are stored in both the neocortex and the hippocampus. Then, during sleep, the hippocampus, acting as a temporary storage system, is cleared for another day of learning, while the memories are retained in the neocortex, which provides permanent storage much like a computer hard disk.” See full article at SciAm.com.

So, I finally gave into the Web 2.0 era of interactive content and user-generated communities. Also, I’ve had it was emailing out interesting articles to my friends everytime I come across something else on the web that is newsworthy, or at the very least noteworthy! Thus, here it is, post #1. Thought provoking, huh? Well, go to sleep, it might be erased! Come back tomorrow and be provoked yet again…