Sedentary Lifestyles

The new science of sedentary behaviour or "inactivity physiology" provides sobering evidence that merely sitting can be hazardous to your health.

Adults and children who spend 70% or more of each waking day working at a desk, riding in a car, watching TV or working at a computer are particularly at risk, says researcher Len Kravitz, Ph.D. "Sitting results in dramatic drops in lipoprotein lipase, which captures fat from blood and uses it as fuel," adds Kravitz. "This leads to soaring levels of triglycerides, elevated risk of cardiovascular disease and lower levels of good cholesterol.

"Even a little weight loss - 3% to 5% of body weight - can be good for your health. Benefits include improved cholesterol levels, better glucose metabolism and lower risk for cardiovascular disease.

Though diet is crucial, it's also important to focus on physical activity. Those who succeed in losing weight and keeping it off average three to seven hours of moderate-to-vigorous exercise per week. "Consistent physical activity is the best predictor of sustained weight loss," said Kravitz.