Fitness boost from an hour 's exercise undone by several hours of sitting . Study adds evidence of the damage caused by our sedentary lifestyles . Experts looked at activity levels of 2,031 adults whose average age was 50 . Research carried out by scientists at the American College of Cardiology in US .
Fitness boost from an hour 's exercise undone by several hours of sitting . Study adds evidence of the damage caused by our sedentary lifestyles . Experts looked at activity levels of 2,031 adults whose average age was 50 . Research carried out by scientists at Medical College of Wisconsin in US .