Contrary to what you may think, a new study shows the less energy we expend, the more we want to eat.

Researchers enlisted a group of young, fit men and women to do a specific amount of physical activity and eat a certain number of calories for one day. They found when the participants were less active, they felt hungrier than they did when they were moderately active, no matter how many calories they consumed.

It appears physical activity, even just walking, can help suppress your appetite, while sitting on the couch burns fewer calories and makes you want more of them!

Also, a new study finds just one workout session can help obese people increase their metabolism and burn more fat.

Researchers from the University of Michigan studied a group of obese women who in one session were told to overeat and stay inactive then in a follow up session to overeat and then exercise. They found the body's fat burning rate slowed down after only one day of overeating, but just one session of exercise brought it back up.