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SCIENCE HAS JUST <\/strong>given you one more reason not to skip your workout. Regular exercise could be turning back the age of your brain\u2014by almost a year. <\/p>\n It didn\u2019t take a lot of exercise, either. When people exercised for 150 minutes a week, their brains stayed younger. (If the number sounds familiar, it\u2019s what multiple health organizations, including the CDC<\/a> recommends for physical activity.) All they did was break their workouts into two 60-minute cardio sessions in the researchers\u2019 lab, followed by a half-hour home workout.<\/p>\n When scientists reviewed the MRI brain scans before and after the year-long trial, they saw that the brains of the regular exercisers were 0.6 years younger than when they first started out. Researchers also looked at the brains of people who didn\u2019t work out at all. Their brains were 0.35 years older. Put together, the difference in brain aging between both groups was nearly a year. <\/p>\n \u201cThese absolute changes were modest, but even a one-year shift in brain age could matter over the course of decades,\u201d says Lu Wan<\/a>, research neuroscience data scientist at the AdventHealth Research Institute and lead study author. Wan and her team unveiled the full results in the Journal of Sport and Health Science<\/a>.<\/p>\n Considering the 130 people in the study were between 26 and 58, the findings suggest it\u2019s still possible to start helping your brain now even if you\u2019ve been sedentary for most of your life. <\/p>\n \u201cEach additional \u2018year\u2019 of brain age is associated with meaningful differences in later-life health,\u201d adds Kirk Erickson, PhD<\/a>, director of translational neuroscience at AdventHealth Research Institute and senior author. \u201cFrom a lifespan perspective, nudging the brain in a younger direction in midlife could be very important. If we can slow brain aging before major problems appear, we may be able to delay or reduce the risk of later-life cognitive decline and dementia.\u201d<\/p>\n How Does Exercise Help Maintain a Younger Brain?<\/p>\n The researchers looked at several potential pathways exercise might work through\u2014changes in fitness, body composition, blood pressure, or potential changes in a protein called BDNF that helps promote the creation of new brain connections. While exercise improved people\u2019s overall fitness<\/a>, the team did not find that any of these measures could statistically explain the reversal in brain aging in this trial.<\/p>\n \u201cThat was a surprise,\u201d Wan says. \u201cWe expected improvements in fitness or blood pressure to account for the effect, but they didn\u2019t. Exercise may be acting through additional mechanisms we haven\u2019t captured yet, such as subtle changes in brain structure, inflammation, vascular health or other molecular factors.\u201d<\/p>\n Still, there\u2019s no need to wait for scientists to figure out the mechanism. Taking action now\u2014whether you\u2019re in your 30s, 40s, and 50s can make a difference later in maintaining a youthful brain.<\/p>\n
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