It's euphoric. It's wonderful!

This makes the spa's cold water pool one of the most important elements of their hydrotherapy circuit.

"It starts as peoples' least favorite pool, but then they love it," Oschefski said. "When you feel the rush of endorphins after you jump in -- from cold to hot, or even hot to cold -- It's euphoric. It's wonderful."

http://www.newportri.com/newportdailynews/news/page_one/ready-to-dive-into-that-cold-water/article_5b197f36-5dfa-5b02-8959-1158f9741549.html