A new study suggested the more TV you watch, the worse your health in older age.juanma hache/Getty ImagesPeople who watch lots of TV are more likely to be unhealthy as they age, a study found. But swapping just an hour of TV for a walk could help you age better, the scientists said.By 2050, 20% of the world's population is projected to be over 65, making healthy aging important.Watching less TV might help you live longer, new research suggests.Researchers from the Harvard T.