Aerobics may be a smart workout for your brain at any age

May 13, 2020

Science Daily/American Academy of Neurology

It's never too late to lace up some sneakers and work up a sweat for brain health, according to a study published in the May 13, 2020, online issue of Neurology®, the medical journal of the American Academy of Neurology. The study suggests older adults, even couch potatoes, may perform better on certain thinking and memory tests after just six months of aerobic exercise.

"As we all find out eventually, we lose a bit mentally and physically as we age. But even if you start an exercise program later in life, the benefit to your brain may be immense," said study author Marc J. Poulin, Ph.D., D.Phil., from the Cumming School of Medicine at the University of Calgary in Alberta, Canada. "Sure, aerobic exercise gets blood moving through your body. As our study found, it may also get blood moving to your brain, particularly in areas responsible for verbal fluency and executive functions. Our finding may be important, especially for older adults at risk for Alzheimer's and other dementias and brain disease."

The study involved 206 adults who prior to starting the six-month exercise intervention worked out no more than four days per week at a moderate intensity for 30 minutes or less, or no more than two days per week a high intensity for 20 minutes or less per day. They had an average age of 66 and no history of heart or memory problems. Participants were given thinking and memory tests at the start of the study, as well as an ultrasound to measure blood flow in the brain. Physical testing was repeated at three months, and thinking and physical testing repeated at the end of the six months.

Participants were enrolled in a supervised aerobic exercise program held three days a week. As they progressed through the program, they increased their workout from an average of 20 minutes a day to an average of at least 40 minutes. In addition, people were asked to work out on their own once a week.

Researchers found that after six months of exercise, participants improved by 5.7% on tests of executive function, which includes mental flexibility and self-correction. Verbal fluency, which tests how quickly you can retrieve information, increased by 2.4%.

"This change in verbal fluency is what you'd expect to see in someone five years younger," Poulin said.

Before and after six months of aerobic activity, the participants' average peak blood flow to the brain was measured using ultrasound. Blood flow rose from an average of 51.3 centimeters per second (cm/sec) to an average of 52.7 cm/sec, a 2.8% increase. The increase in blood flow with exercise was associated with a number of modest but significant improvements in aspects of thinking that usually decline as we age, Poulin said.

"Our study showed that six months' worth of vigorous exercise may pump blood to regions of the brain that specifically improve your verbal skills as well as memory and mental sharpness," said Poulin. "At a time when these results would be expected to be decreasing due to normal aging, to have these types of increases is exciting."

A limitation of the study was that the people doing the exercise were not compared to a similar group of people who were not exercising, so the results may have been due to other factors, although the researchers tried to control for this by testing participants twice over six months before the start of the program. In addition, some of the exercise was unsupervised, so the amount reported may be unreliable.

https://www.sciencedaily.com/releases/2020/05/200513171130.htm

Mental well-being predicts leisure time physical activity in midlife

Different exercise activities are related to the different dimensions of well-being in midlife

May 3, 2019

Science Daily/University of Jyväskylä - Jyväskylän yliopisto

Men and women with high mental well-being at the age of 42 were more physically active at the age of 50 compared to those who got lower scores in mental well-being at age 42. Different exercise activities are related to the different dimensions of well-being in midlife.

Mental well-being was investigated through three dimensions: emotional, psychological and social well-being. Emotional well-being indicates overall satisfaction with life and a tendency to have positive feelings. Psychological well-being refers to experiences of personal growth and the purpose of life. Social well-being tells about relationships with other people and the community.

It was a surprise that leisure time physical activity did not predict later mental well-being or subjective health, but mental well-being predicted physical activity. It seems that mental well-being is an important resource for maintaining a physically active lifestyle in midlife, says Dr. Tiia Kekäläinen from the Gerontology Research Center and Faculty of Sport and Health Sciences, University of Jyväskylä, Finland.

Different types of physical activities are good for well-being

Investigation of various leisure time physical activities revealed that different activities are associated with the dimensions of well-being in 50-year-old men and women. Walking was related to emotional well-being, rambling in nature to social well-being and endurance training to subjective health.

"Although exercise did not predict later mental well-being or subjective health in this study, exercise is important for current mental well-being and health," Kekäläinen says.

These associations were found among both men and women, but additionally, rambling in nature was linked to both emotional well-being and subjective health, but only among men.

"It is possible that rambling in nature means different things for men and women. For example, it correlated with the frequency of vigorous exercise only among men," Kekäläinen says.

The data gathered at ages 42 and 50 by questionnaires and interviews for the Jyväskylä Longitudinal Study of Personality and Social Development (JYLS) were used (n = 303). Prof. Lea Pulkkinen started JYLS in 1968 at the Department of Psychology, University of Jyväskylä. Later, JYLS has been moved to the Gerontology Research Center and is led by Research Director Katja Kokko.

https://www.sciencedaily.com/releases/2019/05/190503112740.htm