May 22, 2009 7:04 pm Develop Exercise Routine Early, Fend Off Heart Disease Later A new study finds beginning a regular exercise routine as young as age eleven can help fend off most risk factors for heart disease. US & World Videos 1:36 Arizona Senate repeals 1864 abortion ban 1:40 Democrats say Big Oil misled public for decades about climate change 1:45 NYPD enters Columbia University in riot gear to clear protest 4:28 ‘Apples Never Fall' and ‘Jurassic Park' star Sam Neill reveals his real name 3:21 Katy Perry's surprising regret about cheeseburger Met Gala look