The Insider.com

Lizzie McGuire sure has grown up into a very mature Hilary Duff. The first-time mom has committed to a strict exercise regime and diet to earn back her pre-baby figure.

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As a celebrity photographed daily, Hilary said, “some people are expecting you to be super human and there are super freaks of nature that are celebrities that lost weight right away and they’re like back to their shapes and I don’t have those genetics.”

VIDEO: Hilary Duff Recalls Emotional Birth

To achieve her goal, Hilary is frequenting the popular spin studio SoulCycle in addition to circuit training. “I’m really motivated. I have a lot of energy and feeling good, …[but] my legs are sore.”

PIC: This is How Hilary Duff Travels

Husband Mike Comrie’s workout is a little impaired at the moment because he’s recovering from hip surgery, but he wants to shed some baby poundage that he put on. The breast feeding mom is carefully preparing a balanced diet for her happy little family. “I'm cooking really healthy and getting all the junk out of the house and he's like, 'Man, dinner's getting a little more boring.' I'm like, 'Yes, but we're getting in shape babe,'” she said.

While Hilary was painting and gardening at a downtown Los Angeles community center for the launch of the Bing Summer of Doing, she was missing the smiley face of baby Luca Cruz. She stressed the importance of incorporating charity into her life to create a better future for her child and all children.For volunteer opportunities in your community, visit Bing.com/doing.