At age 41, as an actress and mom to three young children, Julia Roberts still manages to stay fit and ready for a close-up. She’s a natural beauty, but this busy star also works hard to stay in shape. Her longtime trainer Kathy Kaehler spills the secrets. “We change her workouts depending on the  role. I try to keep it very creative so she doesn’t get bored,” says Kaehler. With the aquatic workouts that Kaehler creates for Julia, boredom isn’t a factor. Kahler states that Julia uses a flotation belt to work out in the pool at her home in Malibu, […]