Adults and kids who watch 3 hours or more a day ... May double their risk of premature death from any cause... Reseachers suggest adults should consider getting regular exercise, avoiding long sedentary periods and reducing TV viewing to one to 2 hrs a day. Adults who watch TV For three hours or more each day may double their risk of premature death compared to those who watch less. According 2 the new research publised in the journal of the Heart assosiation.