Her initial goal was just to lose weight so she could fit into her clothing better.
"But now my goal is to maintain my weight, to tone up, be more fit, and I would love to have arms that look as fabulous as Mrs. Obama's," Tederick said.
Jim White, a spokesman for the American Dietetic Association, applauded the employees. He said studies have shown that having a partner in weight loss aids the process.
"Losing weight is not the easiest thing to do or we wouldn't have overweight in this country," said White, a registered dietitian and personal trainer in Virginia Beach, Va.
Morrison, who has worked in the pastry kitchen since 1995, said she gained weight after giving up exercise because of injuries and not paying attention to her diet. After deciding it was time to refocus on her fitness, Morrison said she would envision herself working out and getting healthier and stronger.
"I persevered and it's nice to come to this point and have happy results," she said. [See photos of the Obamas behind the scenes.]
Perseverance will be important for Morrison in the days ahead. White House chefs will soon begin preparing for a holiday season that, despite Mrs. Obama's focus on eating healthier, still serves up traditional, calorie-laden fare at dozens of parties and receptions that jam the calendar between Thanksgiving and Christmas.