article_snippet: The study, presented at the American College of Cardiology in San Diego, California, adds to evidence of the damage caused by our sedentary lifestyles.
article_snippet: Government research warned last year that inactivity was as deadly as smoking and responsible for a sixth of deaths in Britain.
article_snippet: Scientists from the Medical College of Wisconsin in the US looked at levels of activity of 2,031 adults whose average age was 50.
article_snippet: The adults spent two to 12 hours a day sitting at the office and then in front of the TV.
highlights_snippet: Study adds evidence of the damage caused by our sedentary lifestyles .
  
highlights_snippet: Experts looked at activity levels of 2,031 adults whose average age was 50 .
  