“Given that the development of the brain peaks in young adulthood, it is quite surprising that there would be room for improvement in brain function in healthy young adults,” says Machado.
Your Brain on Exercise
It turns out your sweat sessions are giving you more than just a feel-good endorphin boost — they’re giving you an oxygen high, too. Researchers at the University of Otago analyzed the self-reported activity levels of 52 young women (ages 18 to 30), the oxygen availability in participants’ brains and their performance on a series of reaction-time tasks on a computer. Theses reaction-time tasks were designed to test cognitive inhibitory control, which is the ability to exert self-control when faced with a changing environment. This is cognitive ability is crucial during daily activities like driving a car or when resisting cravings, says Machado.
“Brain cells depend very heavily on oxygen,” she says. Breathing air with a smaller concentration of oxygen, such as at high altitudes, is associated with worse cognitive performance, and the inverse is also true: Increased oxygen is associated with optimal brain functioning.
Based on the study results, you may want to get active for a more oxygen-happy brain. Among study participants, those who worked out more often had more oxygen availability in their brains — and hence, better cognitive functioning. In fact, you’re doing your brain a long-term favor by exercising. Machado notes that effects observed in the study weren’t temporary. In other words, exercise could provide a lasting brain boost unlike the quick mental edge you’d get from downing a cup of coffee.
Best of all: This research suggests you won’t have to spend hours at the gym to experience clearer thinking. “Moderate physical activity, including brisk walking, at least five days a week for at least 30 minutes may suffice to gain benefits with respect to brain function,” says Machado. Brisk walking counted as exercise in the study, though Machado says achieving an elevated heart rate is likely important. (So, strolling leisurely around the block just to hit your fitness tracker step goal doesn’t count!)