Answer: The weekend represents about 30 percent of the week, so too many slip-ups will put you on bad terms with the scale. Case in point: Dieters usually lose weight during the week, but stop losing weight on the weekend because they ate too much. By feasting on whatever you want on the weekend, you’ll cancel out five days’ worth of healthy eating. When it comes to shedding pounds, consistency is key. Aim to consume a similar number of calories on Tuesday as you would on Saturday. Weigh yourself on Friday and again on Monday. Any weight gain is a sign you shouldn’t have eaten the extra slice of pizza.