Busyness May Be Better For Your Brain

Do you ever complain about how busy and hectic your life is? Your to-do list is a mile-long. You spend your day running from place to place. There just aren’t enough hours in the day to get everything done.

If you’ve ever worried about how this busyness might affect your health, here’s some reassuring news: the results of a recent study showed that older adults who lead busy lives tend to perform better on tests of cognitive function than their less busy peers.

The research, published in Frontiers in Aging Neuroscience, is part of the Dallas Lifespan Brain Study (DLBS), which was designed to assess cognition and brain health, structure, and function in healthy adults. 330 healthy adults ages 50-89 from the DLBS participated in the current study on busyness.

The participants were administered a questionnaire regarding their daily lifestyle to assess their level of busyness. They responded to questions such as:

  • How busy are you during an average day?
  • How often do you have too many things to do each day to actually get them all done?
  • How often do you have so many things to do that you go to bed later than your regular bedtime?

Each participant also underwent a series of neuropsychological tests to measure their cognitive performance. The researchers examined five core cognitive constructs—processing speed, working memory, episodic memory, reasoning, and crystallized knowledge.

The results showed that the busier the participants were, the better their cognitive function. A busier lifestyle was associated with superior processing speed of the brain, working memory, reasoning, and vocabulary. The strongest association existed between busyness and episodic memory, or the ability to recall distinct events from one’s past. The findings were consistent across the entire span of ages and education levels.

The research team warns that their data does not lead to the conclusion that busyness causes better cognition. While that is one possibility, it’s also possible that people with better cognition are capable of participating in more activities and tend to seek out a busy lifestyle.

A factor that the researchers believe could possibly mediate the relationship between busyness and cognition is new learning. Those leading busy lives may have more opportunities to learn new things – they’re more likely to be exposed to new information and different types situations from day to day. Previous research supports the theory that new learning enhances cognitive function.

So don’t let your busy life get you down. Focus instead on all the good it might be doing for your brain.

Article sources:

Festini, Sara B. “The Busier the Better: Greater Busyness Is Associated with Better Cognition.” Frontiers in Aging Neuroscience, 17 May 2016.

News release, Frontiers

 

Why the Brain Gets a Boost from Exercise

New research explains why exercise improves our mental health and mood.

 

Exercise is not only good for the body, but for the brain as well. Vigorous physical activity has a positive impact on brain function, mental health and mood. Now researchers from the University of California-Davis Health System have discovered one of the reasons why.

The results of their recent study show that high-intensity exercise results in increased levels of glutamate and gamma-aminobutyric acid, or GABA. These two neurotransmitters regulate the chemical messaging that occurs in the brain.

Within the brain are cells that control physical and mental wellbeing. GABA and glutamate facilitate the flow of messages between these cells. Low levels of these neurotransmitters can lead to depression and other neuropsychiatric disorders.

In a news release from UC Davis, study lead author Richard Maddock said, “Major depressive disorder is often characterized by depleted glutamate and GABA, which return to normal when mental health is restored. Our study shows that exercise activates the metabolic pathway that replenishes these neurotransmitters.”

The findings of the study, published in the Journal of Neuroscience, also provide new insights into brain metabolism. Intense physical activity causes the brain to consume large amounts of glucose and other carbohydrates. In fact, it devours more of this fuel during exercise than during other demanding activities, such as solving complex math equations or strategizing during a game of chess. The researchers now believe that the brain uses the extra energy to produce more neurotransmitters.

38 healthy volunteers participated in the study. The subjects rode on stationary bikes to reach 85% of their maximum heart rate. The research team used MRI imaging to measure GABA and glutamate levels in two areas of the brain before and after exercise. They did the same for a control group that did not exercise.

While there was no significant change in the neurotransmitter levels of the control group, the subjects who exercised showed increased levels of both glutamate and GABA. These increases occurred in two different parts of the brain: the visual cortex (where visual sensory input is processed) and the anterior cingulate cortex (which regulates heart rate, emotion and some cognitive mechanisms).

While the increased levels of glutamate and GABA appeared to diminish with time, there appear to be more enduring effects as well.

“There was a correlation between the resting levels of glutamate in the brain and how much people exercised during the preceding week,” said Maddock, who is a professor in the Department of Psychiatry and Behavioral Sciences. “It’s preliminary information, but it’s very encouraging.”

Maddock and his team hope to perform further research using brain-imaging combined with exercise to determine the impact of less intense physical activity on neurotransmitter levels. They also plan to investigate which specific types of exercise are most beneficial for those suffering from depression.

 

Article sources:

News release, University of California-Davis Health System.

Voss, M. Journal of Applied Physiology, .