More than one third of U.S. residents are obese. Yet the causes of obesity are complex and often debated by doctors. So are the treatments.

Being obese or overweight can make osteoarthritis worse. Staying physically active is one of the best ways to avoid putting on extra pounds. However, many osteoarthritis patients remain inactive.

Osteoarthritis is known as the "wear and tear" form of arthritis. If you're overweight, you could be putting more strain on your joints and adding to this wear and tear. But losing weight could change that.

Kids who used to sweat about going to gym class have little to worry about as those classes continue to disappear. The same holds true for the big kids at colleges and universities.

There's a reason why eating bread and potatoes can be so much more satisfying compared to fruit. Blood flow to the brain can show it.

Weight can be a touchy issue and nobody wants to make a child feel uncomfortable about his or her weight. But promoting healthy diets and exercise need to start early on in life.

Teachers might look forward to recess as much as children do. It's a chance to let kids run off their energy. But recess is also an important daily part of children's overall development.

A new year is on the horizon, along with those pledges to lose weight. Aerobic activity is key to doing just that.

Thoughts of losing weight bring thoughts of dieting to mind, but what about taking the bus to work instead of driving? Walking to the bus stop could burn 100 calories per day.