Can I drink icy water after running 800 meters?

Generally, it is not recommended to drink ice-cold water immediately after running. The detailed explanation is as follows:

After running 800 meters, the body generates a significant amount of heat and body temperature rises. Drinking ice-cold water immediately may cause strong stimulation to the body, leading to blood vessel constriction, which can impair heat dissipation and blood circulation. Additionally, the extremely low temperature of the water may irritate the gastric mucosa, causing constriction of blood vessels in the stomach lining and affecting digestive function. After intense exercise, the body requires substantial energy and nutrients for recovery; drinking ice-cold water at this time may increase the burden on the digestive system.

After completing an 800-meter run, it is advisable to drink an appropriate amount of lukewarm water to replenish fluids and electrolytes lost during exercise. It is best to drink small amounts frequently, avoiding excessive fluid intake at once to prevent overburdening the gastrointestinal tract. Alternatively, beverages containing electrolytes can be consumed to help maintain the body's electrolyte balance.

In daily life, it is recommended to reduce both the quantity and frequency of ice-cold water consumption, and avoid drinking it on an empty stomach. Elderly individuals and children have weaker constitutions and poorer adaptability to temperature changes, so they should consume ice-cold water in moderation to prevent physical discomfort caused by excessive intake.