More evidence for the benefits of exercise: "Researchers from the University of Washington conducted a six-month clinical trial with 33 participants, 17 of whom were women. All showed early signs of Alzheimer's disease and were between the ages of 55 and 85. The experiment participants underwent a six-month intensive aerobic training program, spending 45 minutes to an hour four times each week on a stationary bicycle or treadmill. At the end of the six months, the participants saw improvement in mental agility, while the control group showed no improvement. Researchers are planning further studies to conduct larger and longer duration trials, following volunteers for years instead of months, for more conclusive data as to whether exercise can prevent full-blown cases of Alzheimer's. ... Other similar studies have been conducted, where researchers have measured the health benefits of resistance training for women between the ages of 65 and 75 who are most at risk for developing Alzheimer's. In one study, after one year of training, women who had completed the training showed better scores on mental acuity and conflict resolution tests than those who didn't."