While watching TV for a little bit of time in order to get your entertainment fix isn’t necessarily a bad thing, too much TV can be taxing on the body. TV means physical inactivity, and a 2016 study by JAMA Psychiatry showed that prolonged exposure to TV coupled with prolonged inactivity is associated with midlife executive function and processing speed in midlife. Watching TV for more than 3 hours a day can lead to poor cognitive function. If you’re going to watch TV, try and make up for that time with a walk or some form of physical activity.