Morning exercise should be done before breakfast, because it is not suitable to take part in strenuous exercise after meals. Before morning exercise, you should pay attention to drinking a small cup of cold boiled water about 10℃ as soon as you get up, because after a night's sleep and rest, your body loses a lot of water due to breathing, urination and skin evaporation, resulting in insufficient blood volume, increased blood viscosity and stagnant microcirculation.

In this state, it is easy to induce cardiovascular and cerebrovascular diseases, especially patients with hypertension and heart disease, by taking part in sports as soon as they get up. Drinking water before exercise in the morning can effectively solve this problem.

Therefore, specifically speaking, drinking water in the morning has several functions: First, water will flow directly from the digestive tract and be easily absorbed by the body, which can clean the stomach, stimulate gastrointestinal activities and enhance digestive function;

Second, it can make the stomach wake up immediately, stimulate peristalsis and prevent constipation; Third, it can enhance the excretion function of the liver and promote metabolism; Fourth, it is beneficial to blood circulation, effectively dilutes blood, reduces blood viscosity, lowers hypertension, prevents cardiovascular and cerebrovascular diseases, makes people refreshed and clear-headed, thus improving the body's disease resistance.