o May 1, 2020. The effect of exercise was equal to four fewer years of brain aging. The study used magnetic resonance imaging (MRI) scans to measure the brains of people with a range of activity levels, including those who were inactive to those who were very active. The scans showed less active people had smaller brain volume. “These results are exciting, as they suggest that people may potentially prevent brain shrinking and the effects of aging on the brain simply by becoming more active,” said study author Yian Gu, Ph.D., of Columbia University in New York and a member of the American Academy of Neurology. “Recent studies have shown that as people age, physical activity may reduce the risk of cognitive decline and dementia. Our study used brain scans to measure the brain volumes of a diverse group of people and found that those who engaged in the top third highest level of physical activity had a brain volume the equivalent of four years younger in brain aging than people who were at the bottom third activity level.” The study involved 1,557 people with an average age of 75. None had dementia, but 296 people had mild cognitive impairment and 28% had the APOE gene that is linked to a greater risk of Alzheimer’s disease. Participants were given physical exams, thinking and memory tests, and were asked about their daily tasks and other physical activities. Researchers then calculated how much time and energy each person spent on those tasks and activities. Researchers divided people into three groups: those who were inactive; those who were somewhat active meaning each week they either had roughly two-and-a-half hours of low-intensity physical activity, one-and-a-half hours of moderate physical activity or one hour of high-intensity physical activity; and those who were most active meaning each week they either had seven hours of low-intensity physical activity, four hours of moderate physical activity or two hours of high-intensity physical activity. Researchers then reviewed MRI brain scans of all participants and found that when compared to the people in the inactive group, those who were most active had larger total brain volume. After adjusting for age, sex, education, race/ethnicity and APOE gene status, the average brain size for those who were inactive was 871 cubic centimeters compared to 883 cubic centimeters for those who were most active, a difference of 12 cubic centimeters, or 1.4%, or the equivalent of nearly four years of brain aging. The results remained similar even after excluding people who had mild cognitive impairment. “Our results add to the evidence that more physical activity is linked to larger brain volume in older people,” said Gu. “It also builds on evidence that moving your body more often throughout one’s life may protect against loss of brain volume.” A limitation of the study was that information on physical activity relied on a person’s ability to remember how often and for how much time they were active. Additionally, Gu noted that due to the particular study design, this study does not prove that exercise prevents brain shrinkage; it shows an association. The study was supported by the National Institute on Aging and the National Institutes of Health.
November 23, 2020
December 15, 2020
November 13, 2020
- SABCS 2020The 43rd Virtual San Antonio Breast Cancer Symposium (SABCS®) will take place from December 8-11, 2020. The SABCS is the premier conference for basic, translational, and clinical cancer research professionals. It is well-known for presenting the latest breast cancer data from all over the world.
- ACC 2020The American College of Cardiology decided to cancel ACC.20/WCC due to COVID-19, which was scheduled to take place March 28-30 in Chicago. However, ACC.20/WCC Virtual Meeting continues to release cutting edge science and practice changing updates for cardiovascular professionals on demand and free through June 2020.
- ENDO: 2020ENDO 2020 Annual Conference has been canceled due to COVID-19. Here are highlights of emerging data that has still been released. Keep an eye out for ENDO Online 2020, which will take place from June 8 to 22.
- CROI 2020Every year, CROI hosts some of the world's leading experts in HIV research, who come to present exciting new data and drive forward the field of HIV/AIDS research. This year, due to COVID-19, CROI held their meeting virtually.