The Year in Fitness

By GRETCHEN REYNOLDS

http://well.blogs.nytimes.com/2011/12/28/the-year-in-fitness/

" --- Perhaps the most inspiring exercise science published in 2011 involved the effects that working out can have on the brain. By studying both lab rodents and people, scientists this year showed that exercise increases cognitive sharpness, even if the amount of exercise is small. In a representative experiment involving mice, which I wrote about in September, scientists at the University of South Carolina found that the equivalent of about 30 minutes of jogging a day changed the animals’ brain cells at a molecular level. After a few months of running, their neurons contained more mitochondria, a cell component that produces energy, than did the neurons of sedentary mice. In effect, their brain cells had become more robust and physically fit, thanks to the jogging.---"