Experts say that drinking cold water after exercise is only a small probability event, but drinking a lot of cold water is the "fuse" that leads to sudden death. People with underlying diseases should exercise as little as possible and don't drink a lot of cold water after exercise.
Drinking a lot of cold water after strenuous exercise will also increase the heart load and lead to sudden death. Drinking a lot of cold water after exercise will stimulate the contraction of gastrointestinal blood vessels, cause spasm of stomach and intestinal organs, and increase the heart load.
From a scientific point of view, it is not recommended that you drink a lot of cold water immediately after exercise, because this in itself violates people's normal physiological functions. Don't drink water immediately after exercise, walk slowly to restore the heart rate to normal level, and then drink water in moderation.
It is best to drink warm water after exercise, don't stimulate blood vessels, don't drink water quickly or slowly, don't drink too much at a time, and gradually replenish it. In addition, try not to take a bath immediately after exercise and drink less carbonated drinks.