Judging from the body mass index 2 1. 1, your weight is within the normal range. However, a normal body mass index does not mean that body fat must be normal. If your body has a lot of fat, such as waist, abdomen or thighs, then you still need to lose fat. However, 20-year-old women usually have high demands and goals for reducing fat and shaping, so you need to consider other factors to make a suitable plan for reducing fat or shaping.

In addition, generally speaking, women's goals in reducing fat and shaping may include the following aspects:

1. Control weight and body fat content: Keeping healthy weight and body fat content is one of the important goals for women to lose weight and shape. By controlling diet and increasing exercise, you can effectively reduce body fat content and shape your ideal figure.

2. Increase muscle mass: Appropriate muscle mass helps to improve basal metabolic rate, promote fat burning, and enhance the body's sense of line and strength.

3. Improve the proportion of body composition: By reducing the fat content and increasing the muscle mass, we can improve the proportion of body composition and make the body healthier and more beautiful.

4. Shape your body: Shape your ideal body through specific training and diet plans, such as hips, small waists and tight thighs.

5. Improve self-confidence: The process of reducing fat and shaping can improve self-confidence and self-esteem, which is one of the goals pursued by many women.

Therefore, whether you want to lose weight or get in shape, you need to make a suitable plan to achieve your goal. I suggest you consult a professional fitness coach or dietitian, make a personalized plan according to your own situation, and pay attention to maintaining a healthy lifestyle.