America's Obesity Crisis:Weight Loss: The Secrets Of Their Success

Shedding pounds isn't easy. Keeping them off is harder still. What we can learn from those who did

Olga Arias, 46, knows what it's like to be obese. "Ever since I was a kid, I was probably always chunky," she says. "Every year I would just gain weight." By the time the 5-ft. 5-in. San Francisco city worker was 34, she tipped the scales at 260 lbs. "I was self-conscious about everything--getting on a bus, sitting in an airplane seat," she recalls. "I would put off seeing doctors, I was so embarrassed."

Like millions of other plus-size Americans, Arias had tried a couple of times to lose weight--only to regain every pound she shed and then some. Finally, one...

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