I have the habit of running in the morning in northern Jilin. What problems should we pay attention to now that the weather is cold?

It's getting cold, so it's best to warm up at home before running in the morning, such as washing your face with cold water to stimulate vasodilation; Drink half a cup of warm water to wake up the gastrointestinal circulation; Taking a step before going out can adapt the cardiovascular and cerebrovascular diseases.

But from a scientific point of view, it is not in favor of morning running. Because people just wake up from sleep in the morning, the internal organs are in poor condition and need time to adapt. If temperature difference stimulation is added, cardiovascular and cerebrovascular accidents are more likely to occur at this time. So exercise is more suitable for the evening.