"I've had insecurities," the Something Borrowed star shares with the fitness mag. "I can look at a picture of Gisele [Bundchen] all day long and say, 'I'll never have legs that long or lips that big.' You have to honor who you are."
The sunny California native, 35, does so by maintaing her physique and staying healthy. "My workout mantra is 'break a sweat every day,'" she tells Self. Even if it's just for 20 minutes."
Hudson, wearing skimpy red swimsuit bottoms and a floral-pattern wetsuit top, shows off her toned legs and flat tummy in the cover shot taken on the beach. The Fundamentalist actress flashes her trademark smile for the camera in multiple accompanying shots taken by photographer Miguel Reveriego, including one of the Fabletics co-founder modeling an outfit from her line.
"I think happiness is a practice," she further explains to Self. "But not the sort you find in self-help books, where you smile and have a vision board. You're fooling yourself to think that's how you're going to find it. I love the idea of a gratitude journal, but there are times when mine turns into a venting journal. Not so grateful, just a big ol' vent!"
Indeed, Hudson's last year has been filled with reasons to both vent and express gratitude. "Relationships are the most challenging things," Matthew Bellamy's fiancee shares. "It's where you do the most work in your life. You come face-to-face with yourself, and if you can deal with realizing we’re all flawed, accept it and work with it, you might have a really amazing, lasting relationship."
The Wish I Were Here star muses, "If I look at my parents [Goldie Hawn and Kurt Russell], who've been together thirtysomething years, I'd say no matter what they've been through, they share similar values and really like each other."
"It sounds simple, but it's not," she adds. (As previously reported, Hudson and Bellamy's three-year engagement hit a rough patch recently due to distance. "They're committed to being great parents," a source told Us of the pair working it out.) "I want to be around for a while for my kids," she tells Self of sons Ryder, 10, and Bing, 2.
Rivaling Hudson's love for fitness and family is her deep appreciation for food. "I make sure I eat well without depriving myself of the things that I love," she says, while rattling off her favorite dishes including "cheeseburger and fries, creamy white-truffle pasta, bowls of ice cream." She adds, "Everything in moderation, but I indulge at least three times a week."
The May 2014 issue of Self magazine this newsstands on April 29. Tell Us: What do you think of Kate's advice?