Just a bit of exercise can help keep your brain in shape as you age, according to the latest study that shows how physical activity can benefit older minds. “This finding isn’t saying, ‘If you’re older, you need to go out there and start running marathons,'” said lead author Marissa Gogniat, a recent doctoral graduate in psychology from the University of Georgia. “This is saying if you get more steps, if you’re moving around your environment a little bit more, that can be helpful to your brain health and keep you more independent as you age,” Gogniat said in a university news release. The researchers measured the fitness and physical activity of 51 older adults. Their thinking skills were measured using tests on cognitive functioning, and their brain functioning was assessed via MRIs. According to the study authors, this is the first study to examine how physical activity interacts with …