Girls' Generation Yoona Reveals how she Stays Fit, 'I Move as Much as I Eat'

Girls' Generation Yoona revealed her secret to staying fit on TBS's documentary, "Passion Continent" which aired in Japan on March 24. After all, it is her high activity levels that enables her to eat to her fill and still stay in shape.

In this episode of "Passion Continent," they revealed a behind-the-scene report of Girls' Generation's preparation for 2013 Arena Tour in Japan as well as their activity in Korea.

Among many everyday scenes that were captured, Sunny and Yoona's gorging was a regular.

Responding to a staff member who commented, "You seem very hungry," Yoona replied, "I am always hungry. I think I get even hungrier when I am in Japan."

She revealed that her high activity levels from dance practices and performances are what keep her thin despite all the eating. She also added that her favorite Japanese food is sushi, don-katsu sandwich and many more.