One Thing You Can Do Now To Keep Your Brain From Shrinking Later

There are a lot of good reasons to stay physically fit into middle age. Better sleep, muscle strength, heart health, and even mental performance are all perks of keeping up with exercise. And now, a new study shows that staying in shape in your 40s might even help protect your brain from shrinking later on in life.

Researchers from the Boston University School of Medicine found an association between brain tissue volume at age 60 and physical fitness levels in a person’s 40s. Specifically, people in their 40s who had lower fitness levels or had a higher rise in diastolic blood pressure (the lower number in a blood pressure reading) or heart rate after spending a few minutes on a slower-moving treadmill (2.5 miles an hour), were more likely to have smaller brain tissue volume at age 60.

Researchers explained that when someone is not very physically fit, his or her blood pressure and heart rate will be much higher in response to just low levels of exercise, compared with someone who is physically fit.

 

What this might have to do with the brain: “Small blood vessels in the brain are vulnerable to changes in blood pressure and can be damaged by these fluctuations,” Nicole L. Spartano, PhD, a postdoctoral fellow at the Boston University School of Medicine, said in a statement. “Vascular damage in the brain can contribute to structural changes in the brain and cognitive losses. In our investigation we wanted to determine whether exaggerated blood pressure fluctuations during exercise were related to later structural changes in the brain.”

The study included 1,271 people who were part of the Framingham Offspring Study, who underwent the treadmill testing at an average age of 41. Then, when they were 60, on average, they all underwent MRI brain scans and cognitive testing.

In addition to finding the association with brain tissue volume, the researchers also found that people whose diastolic blood pressure increased more during the treadmill test did worse on the cognitive testing (which examined decision-making functioning) when they were 60. They also found an association between higher resting systolic blood pressure (the top number in a blood pressure reading) at age 40 and a greater volume of white matter hyperintensity, which they said is indicative of blood flow loss that occurs with aging.

 

"Many people don’t start worrying about their brain health until later in life, but this study provides more evidence that certain behaviors and risk factors in midlife may have consequences for brain aging later on," Spartano said in the statement.

The study was presented at the American Heart Association EPI/Lifestyle 2015 meeting; because it has yet to be published in a peer-reviewed journal, the findings should be regarded as preliminary.

But still, this isn’t the first study to draw a correlation between physical fitness in middle age and brain health later in life. A study published last year in the journal Neurology showed that physical fitness in young adulthood (defined in the study as between ages 18 and 30) was associated with better performance on cognitive tests when they were in their early- to mid-40s. Another study, also published last year, showed an association between being physically active and being less likely to develop dementia in elderly age.

 

 

Yahoo.