From down under
 

Research from Australia found that out of more than 2,000 subjects who exercised vigorously for at least 2.5 hours per week, those who watched more than 40 minutes of television per day had higher waist circumferences, blood pressure and blood-glucose levels than those watching less than 40 minutes. Researchers theorize that sitting for prolonged periods severely compromises your body’s ability to burn fat. Avoid a slump in fat-burning potential by getting up and stretching, or taking a short walk at least every 20 minutes or so.