If you are afraid of growing muscles, you should pay attention to the intensity of exercise. You don't have to run five kilometers a day. Running only takes 30-60 minutes every day, which is very suitable for slimming. If you run for an hour every day, you will lose weight faster, or just run for 20 minutes at a time. If you keep running for less than an hour every day, you will lose weight. You can also combine running with slimming and beauty. There is nothing unsuccessful about losing weight. It's very popular at present, thinner than running.