Detergents evolved from animal fat and lye to modern chemical solutions. Alkalies neutralize acids and remove dirt without excessive rubbing. Surfactants lift dirt and oils from fabric and attach them to water. Enzymes break down specific soils and allow lower water temperatures
Ice baths involve cold water immersion with added ice. Cold water constricts blood vessels, leading to vasodilation upon warming. Large muscle groups can be cooled simultaneously
Cold water burns about 8 calories more than room temperature water. Helps maintain core temperature during exercise. Most people can safely drink cold water without issues. Some people with achalasia may experience chest pain after drinking cold water