Exercise, the first choice is swimming and running, full-body exercise, which helps to shape. In summer, whether you run in the morning or in fun run, you will sweat a lot. Pay attention to persistence. If you persist for two months, you can run five kilometers at a pace of less than six minutes, but not too fast at ordinary times. You can jog at a speed of 7: 30 per kilometer to replenish water, but you must pay attention to losing weight.