For our purposes, a recent study followed about 200 midlife women for as long as forty-four years. The results show that those with the highest level of cardiovascular fitness in midlife had a whopping 30 percent lower risk of developing dementia as they got older compared to those who remained sedentary. As a dementia specialist, I can assure you that a 30 percent reduction in the rates of dementia is nothing short of extraordinary—so far, no drug has achieved such an effect.
