finally I can blame my lack of attention span on ....

too much TV.

scienctists are finding that the more you use your brain the less likely you develop Alzheimer's.

"One of the most extensive and widely cited investigations on the subject, the landmark Nun Study, tracked 100 Milwaukee nuns who had written autobiographies in the 1930s. More than 50 years later, scientists gave them cognitive tests and examined the brain tissue of nuns who died. Those who demonstrated lower linguistic ability in the autobiographies were at greater risk for Alzheimer's disease."

follow the link here.

sorry for adding another bodypart to exercise to the list.
but you can allways go back to your TV and eventualy never see any reruns again.