Want to boost your brain power? Walk more according to a study from the University of Illinois. Walking has also been shown to reduce mild cognitive impairment (a precursor to Alzheimer's and dementia) after six months, reported a study from the University of British Columbia. Participants whose exercise routine entailed walking outside or weight training enjoyed improved memory and learning skills after just six months. Balance and toning exercises like yoga and Pilates, on the other hand, didn't boost their cognitive performance. I wouldn't give up yoga (if, you know, I was actually good about going), but I might start walking there .