Smoking tabacco is my answer.
Twelve months of once-weekly or twice-weekly resistance training benefited the executive cognitive function of selective attention and conflict resolution among senior women.
its consiterd a disease because it can have a risk of heart attacks and it can cause your body not to function right meaning no more getting up to do things and no more seeing the sun or the birds unless you have a weel chair and its consitered a disease because you are mostlikly to die a couple years ater unless you change your way and loses weight.
i hope this helps