Whether running in the morning or in the evening, both have the benefits of burning calories, boosting metabolism, enhancing physical fitness and developing willpower. Running in the morning and running in the evening have their own benefits and drawbacks, so we cannot simply compare which time is better for running. Should be based on their own circumstances, reasonable arrangements for running time. First, the morning running 1, the benefits: can promote blood circulation in the body, to maintain energy, quick thinking; workplace or student running in the morning can make the rest time more regular; morning running will have a sense of hunger, conducive to the good habit of eating breakfast; 2, the disadvantages: fasting running may lower blood sugar levels, easy to cause dizziness, hypoglycemia, etc.. Diabetic patients are not recommended to run in the morning on an empty stomach, which may cause an accelerated heart rate, increased blood pressure, and easy to produce overload conditions. Second, the evening running 1, benefits: moderate running can promote blood circulation, release stress, improve sleep quality; can avoid ultraviolet damage to the skin; cardiovascular and cerebrovascular load is small; 2, disadvantages: more unsafe factors at night, the darker sections are prone to accidental falls, etc.; after running a lot of sweating and the ambient temperature is low, easy to catch a cold; if the running time is too long, the brain nerves are too excited, and It is easy to cause insomnia. Running in the morning on an empty stomach can bring along candy or snacks. Avoid running in the dark and remote areas at night, it is better for girls to run in pairs and increase or decrease clothing according to the temperature. Avoid running immediately after meals, it is recommended to run 1-2 hours after meals.