Relying on Crash Diets

Determined to lose 10 pounds fast, you turn to a crash diet. Perhaps your plan calls for nothing but grapefruit or cabbage soup each day. You slash your daily calories to fewer than 1,000 -- and sure enough, the pounds melt away. But when you eat so few calories, you train your metabolism to slow down. Once the diet is over, you have a body that burns calories more slowly -- and gains weight more quickly -- than ever before.