New research has revealed just how sedentary Cardiffians are, with more than half (57 percent) admitting they spend MOST of their spare time on the sofa and do next to no exercise. In fact, 43 percent of exhausted Cardiff adults said they love spending their weekends ‘just chilling’ after a hectic week and 56 percent admit they are a couch potato. And while six in 10 say they feel restless if they spend the whole day in the house, the average Cardiffian will spend…