Alzheimer's disease is the sixth most common cause of death in the United States, an estimated 5 million Americans currently suffer from Alzheimer's.  As the cells of the brain slowly and progressively fail, those afflicted with Alzheimer's begin to experience problems with memory, thinking, and behavior.  While there is currently no cure for Alzheimer's, several risk factors have been identified including age, family history, and genetics.  Unfortunately, there isn't much you can do about any of that.  But, researchers have identified several modifable risk factors that may help prevent the disease, such as heart health and healthy aging.  A new study suggests that exercise improves cognition in adults that are at risk for Alzheimer's disease.  According to the study, adults age 50 and older who are physically active are less likely to experience cognitive decline than inactive adults.  It is not clear yet why exercise acts as a guard against memory loss, however it is speculated that it may be related to improved cerebral vascular function and the neurovascular integrity associated with exercise.  The take home message is, if you're already exercising regularly, keep it up.  If not, start exercising today and do what you can to maintain a sound mind and body, no matter what your age.

(Source: To Your Health, Nov. 2008)