Because after a night's sleep, blood flow slows down, blood viscosity is high, and blood vessel pressure increases, which is the most dangerous time for patients with cardiovascular and cerebrovascular diseases. During this time, going out for running and fitness, the load on the heart increases, and the load on organs such as kidneys and lungs also increases. It is particularly prone to myocardial infarction, cerebral hemorrhage and premature beats, which is harmful to the body.
It is easy to damage bones and joints.
In the morning, human joints are stiff, the degree of lubrication is not high, and muscles, tendons and ligaments are still in a relaxed state. Running out for fitness is easy to cause injuries. So before 9 am, it is best not to run for exercise.
Poor visibility is prone to accidents.
Sometimes it's foggy in the morning, and it's late in winter. If a person gets up early and runs outside for fitness, it is easy to have an accident.
9 am ~ 165438+ 0 am
During this period, when the sun rises, the photosynthesis of plants has started in an all-round way. Green plants are constantly delivering fresh oxygen, the sun is rising, birds are singing and flowers are fragrant, and everything is clear. After people have eaten a rich breakfast and supplemented with appropriate amount of water, the internal organs of the human body have turned to normal work, which is suitable for people to walk quickly outdoors.
15: 00 ~ 2 1: 00 pm
Traditional Chinese medicine believes that 15: 00 ~ 2 1: 00 is the most sufficient time for human yang. At this time, the body function will reach the maximum, the brain cells are in the most active state, they are sensitive and active in thinking, and the oxygen content in the atmosphere is also relatively high, which is most suitable for going out for quick walking and fitness.