Meanwhile, Robles — whose rigorous training schedule leaves her little time for outside work — struggles to pay for food. It would be hard enough for the average person to live off the $400 a month she receives from U.S.A. Weightlifting, but it’s especially difficult for someone who consumes 3,000 to 4,000 calories a day, a goal she meets through several daily servings of grains, meats and vegetables, along with weekly pizza nights.

She also gets discounted groceries from food banks and donations from her coach, family and friends — or, as Robles says, “prayers and pity.” Robles could save cash by moving into the free dormitories at U.S. Olympic Training Center in Colorado, but she refuses to leave her coach, Joe Micela, who’s become a father figure to her: Her own father died of a blood vessel disease when she was 17.

Robles grew up in Desert Hot Springs and San Jacinto, Calif., where she became a top-ranked shot putter who earned scholarships to University of Alabama and later Arizona State University. She was self-conscious about her body from a young age, until middle school, when she first got into sports and discovered she could use her large frame to her advantage.

“When she got into sports, she came home one day and she said, ‘I finally feel accepted.’ That's when she just kind of settled into herself,” her mom Joy Robles says.

Coach Micela began working with Robles in 2008, when she was attending Arizona State and began lifting weights to improve her shot-put throw. Within just three months of training with Micela, Robles had qualified for weightlifting nationals and decided to forfeit her scholarship. She began competing across the country and the world — beating every other American at the world championships last year. Then, in March, Robles and fellow super heavyweight competitor Holley Mangold qualified for the U.S. Olympics team. (Robles beat Mangold by four kilograms.)

Because of her financial troubles, Micela donates much of his time and pays to travel with Robles to competitions. Most Olympians make money through their governing bodies, as well as sponsorships, endorsements, speaking engagements, and the like. These endorsements can be worth six figures or more — like Michael Phelps’ $1 million deal to be a spokesman for Mazda in China — or they can compensate athletes with free equipment or products. PowerBar is Robles’ only product sponsorship and her name isn’t yet big enough to land her any big special appearances.

“It’s simple,” Robles says. “If a company wants to advertise their brand, there’s no benefit in sponsoring you if you’re not getting any exposure.”