What are contrast showers?

Contrast showers involve alternating between hot and cold water during a shower. Typically, this might include periods of hot water (as hot as one can tolerate) followed by cold water (as cold as one can tolerate). The process might look something like three minutes of hot water followed by one minute of cold water, repeating this cycle multiple times during the shower. The idea is to expose the body to varying temperatures, which can have various health benefits 1.