Plunge baths are commonly known as cold baths that are often used for therapeutic purposes, especially after a workout or a hot sauna. However, there are several synonyms for plunge baths, including cold baths, ice baths, and cryotherapy. Cold baths involve immersing oneself in cold water, typically at a temperature of 55°F or lower. Ice baths are like cold baths, but they include ice. Cryotherapy is a type of treatment that involves the exposure of the whole body, or specific body parts, to extremely low temperatures (below -100°F) for a few minutes. Regardless of the synonyms, all of these terms are used to refer to the same basic concept.