How some CEOs do it
Height-weight: 5 ft., 8 in., 145 pounds.
Swears by: Juice "cleanses," three-to-five day fasts where she eats nothing but fruit and vegetable drinks (under a nutritionist's supervision).
Weight change: Gained, and lost, eight pounds.
Bad habit: Eating late at night after a busy day.
Can't resist: Chicken wings, fried or otherwise.
A former model, Smith has been as thin as 115 pounds. "That's not who I am," she said. When she hits 8 pounds over her ideal weight, she does a juice cleanse, either at home or a New York spa. On the way back from the spa, she treats herself to a new outfit at a nearby outlet mall.
Height-weight: 5 ft., 9 in., 205 pounds.
Diet inspiration: When Wall Street and Citigroup were investigated by the New York State attorney general for stock-research conflicts, he resolved to get thinner.
Weight change: Lost more than 40 pounds.
Won't touch: Bread, dessert, gin.
Soft spot: Wines like Chateau Margaux and Vega Sicilia.
Weill started off by walking every morning with Charles Prince, his designated successor at Citigroup. Last January, he hired a personal trainer to come to his home at 6 a.m. After the investigation was settled, Weill allowed himself a gin martini.
Height-weight: 6 ft., 4 in., 207 pounds.
Swears by: Treadmill, Special K.
Travel strategy: On jaunts to Hong Kong, he packs sneakers and shorts to keep up running-and-weights routine.