I'm sorry to tell you that it's unrealistic and unhealthy to lose weight quickly in a week. Losing weight should be a continuous process, which requires planning a reasonable diet and proper exercise to achieve a healthy and lasting weight loss effect.

However, the following methods can help you improve your leg lines and make your legs look slimmer:

1. Control diet: reduce the food intake with high calorie, high fat and high carbohydrate. Eat more healthy foods such as vegetables, fruits, chicken breast and fish.

2. Increase aerobic exercise: Aerobic exercise is one of the most effective ways to burn fat. It is recommended to do at least 150 minutes of aerobic exercise every week, such as brisk walking, running, jogging, swimming and skipping rope.

3. Do strength training: Strengthening leg muscles can shape better leg lines. You can do weight training and leg muscle training.

4. Massage: Leg massage can promote blood circulation and relieve leg edema and edema. You can use some massage appliances or massage yourself manually.

In short, if you want to slim your legs and stay healthy, you need to take a long-term active way to lose weight, with a good diet and proper exercise, in order to achieve your goal.