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What are the advantages and disadvantages of alternating hot and cold bathing for people's health?
One cold and one hot can speed up blood circulation, which is a health preserving method. Can effectively promote metabolism and expand pores. But it's easy to catch cold, and your internal organs can't stand it. Alternating hot and cold bathing can delay aging and prolong life to some extent. However, it should be based on personal physique, or you will catch a cold and get sick.