Heidi Klum, the 33-year-old German supermodel has revealed her secret on how to maintain her body even after having three kids. She said being active is the only secret. The supermodel said that her kids keep her busy, and she also started playing tennis.

“I have three children. That keeps you busy all the time. I work and we do a lot of things that are active. We work in the garden. We jump on the trampoline. I just started playing tennis with my husband. We climb in the tree house with the children. We go to the park and feed the ducks. We are always mobile,” Heidi Klum told People.

Heidi Klum made a grand comeback with a steamy ad campaign for apparel manufacturer Jordache.