We all know that we don t need reasons to exercise. They are beneficial in ways more than we can imagine. But if there s one more reason that you need to add in that list of innumerable benefits then add this improved thinking when suffering from Alzheimer s disease a form of dementia. A new study done at the Massachusetts General Hospital reported that exercising promotes the growth of new brain cells that improve thinking capacity in mice with a form of Alzheimer's disease. The researchers from MGH said that there were possibilities to develop drug and gene therapies