QUOTE : Even if you exercise every day, sitting around too much can still be harmful to your health and your waistline. Researchers noticed this while tracking a group of more than 4,000 Australian adults who exercised for the often-recommended 150 minutes per week. Even though they were physically active for 30 minutes on most days, as their time in front of the TV went up, so did their waist size and blood pressure. In women, more television time was also linked to potentially harmful changes in their cholesterol.