If you're thinking of going on a diet to cut extra pounds, don't do it today, because a new study has claimed that Tuesday is the worst day of the week to begin a diet. The poll of 2,000 British women who have dieted in the past year found that dieters who start on a Tuesday are most likely to lose their resolve within a week - and end up heavier than when they started. On the other hand those who start on a Sunday or Monday are far more likely to shed the most weight. "Psychologically, dieters are more motivated to continue if they start afresh at the beginning of the week," the Daily Mail quoted a spokesman for Tesco Diets, which commissioned the poll. Sunday dieters lost an average of 8lb over three weeks - and 88 per cent then kept that weight off. The study also found that those who start their diet on a Saturday have a clear goal in mind and are more likely to see the dieting commitment through to the end to meet their weight-loss targets. It also emerged the majority ditch their diet on a Friday after a stressful week at work.