Any kind of physical activity lowers Alzheimer's risk

USA Today reports:

Cleaning house and doing yardwork are taking on new importance. A higher level of physical activity — not just exercising — is linked to a reduced risk of developing Alzheimer's disease even in people over 80, suggests research published Wednesday in the journal Neurology.

Protective activities include washing dishes, cooking, cleaning, gardening — even playing cards. People who scored in the bottom 10% of physical activity were more than twice as likely to develop Alzheimer's.