It must run well. Running and brisk walking are exercises for human body, endurance and cardiopulmonary function. But running is better. \x0d\ But seemingly simple running also involves a lot of knowledge. If you plan to keep fit by running, you must master the relevant knowledge first. Running is also a science. If you don't choose the right time, it is also harmful to your health ... Why can't you run before sunrise? Because at night, there will be a lot of pollutants on the ground, and the air on the ground will be very bad, and before sunrise, it will be bad for the health because of the carbon dioxide released by plants and humic layers on the mountain at night. But the sun hits the ground after sunrise. The atmosphere began to convection up and down. In this way, pollutants will be carried into the air and spread. So I suggest running after sunrise. \x0d\ 1 At the beginning of exercise, the running speed should be limited to no uncomfortable feeling, and the running distance should be subject to no feeling of exertion. Muscle pain in lower limbs may occur after running, which is a normal reaction. This phenomenon will disappear after a few days of exercise, and it is advisable to run 5 to 10 km at a time. The fat man runs slowly first. When running, the weight of the whole body is supported by the knee joint and ankle joint. For overweight people, it is easy to make joints bear too much weight and cause injuries. "Learning self-control is especially important. Because sometimes the desire to run suddenly disappears, it is necessary to distinguish between' unable to run' and' unwilling to run'. Of course, if you are sick, you should never run, but in other cases, you should overcome inertia and keep exercising. " 3 The basic law of jogging, the best jogging frequency for ordinary people is to run three times a week for 35-45 minutes each time. Correct breathing method during running: \x0d\ 1. Inhale through your mouth and nose, and exhale through your mouth while running. \x0d\ 2。 Jogging generally adopts three-step breathing method. \x0d\ 3。 Generally speaking, middle-speed running adopts two-step breathing method and two-step breathing method.