The 33-year-old actress was spotted showing off a very svelte figure last week and her trainer admits she has put in a lot of hard work to get back in shape, reported Female First.
Fitness guru Jason Walsh said, "The secret to Jessica's body is her commitment. She enjoys the way she feels when she works out and the results that she sees."
The "Total Recall" star was a self-confessed gym lover before giving birth and wasted no time getting back to her intense fitness routine.
The actress is reportedly also following a Paleo-inspired diet, but still wants to set a healthy example for her son.
"She works hard and eats right so that she can indulge from time to time. Now that she's got a child, she wants to make sure that she instills healthy eating habits, not obsessive ones. She'll be the first one to bake cookies with Silas once he's old enough," an insider said.
