"As many times as you can deliver the message of healthy living and repeat it, that helps," she said.
Parents shouldn't forget they serve as role models, even for their teens, Strohm said. "If your child sees you trying to eat right and be healthy, it does rub off on them," she said.
Iannotti said parents should try to encourage physical activity with their children. "Go for a walk after dinner or do something else active as a family, and you'll cut down on screen time too," he said.
The Nemours Foundation KidsHealth website offers food and activity advice tailored to teens.
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