Q: Is it true that people who have lost a lot of weight need to exercise more than others to keep it off?
Oz Says: Unfortunately, yes. Your body hates losing weight. When it does, its calorie-burning furnace gets less efficient. So if you once weighed 180 pounds and you're now 150, you burn fewer calories going about your day than your 150-pound friend who was never overweight. There is good news, though: Once you lose weight, you naturally move more. And surveys of successful losers say daily exercise helps keep pounds off.
This story originally appeared in the May/June 2014 issue of Dr. Oz The Good Life.