'Guilting' middle-schoolers to exercise won't get them to be any more active, according to a recent study.

Researchers at the Universities of Georgia and South Carolina found that students who don't feel in control of their exercise choices or who feel pressured by adults to be more active typically aren't. Middle-schoolers who feel they can make their own decisions about exercising are more likely to see themselves as a person who exercises, which in turn makes them more likely to exercise.

"Our results confirm that the beliefs these kids hold are related to physical activity levels," Rod Dishman, lead author of the study, said in a statement. "But can we put these children in situations where they come to value and enjoy the act of being physically active?"

Researchers are currently looking at ways to help kids identify with exercise at a younger age, so that by the time they reach middle school they are more likely to identify as someone who exercises. This might mean teaching more structured games in elementary school, integrating physical activities into classroom lessons or expanding community recreational leagues to give kids more opportunities to improve on a particular sport.

"Just like there are kids who are drawn to music and art, there are kids who are drawn to physical activity," Dishman said. "But what you want is to draw those kids who otherwise might not be drawn to an activity."

Dishman said parents should avoid creating a sense of guilt around their kids for not exercising. The research overwhelmingly found that students who felt obligated to be more active were less likely to embrace activity overall.

"The best thing is to do it because it's fun," Dishman said. "It's the kids who say they are intrinsically motivated who are more active than the kids who aren't."

The findings are detailed in the journal Medicine & Science in Sports & Exercise.