Exercise physiologist Ben Taylor said he had tried the method and cautioned people doing it for the first time.
"For the regular person, [prolonged exposure to cold water temperatures] is not advised," he said.
"If you are going to stress the body out, you want to do it gradually, such as altitude training.
"Start with something small, like 30 seconds in a cold shower, and then over a period of time, slowly increase that time."
Â
Both health professionals advised against ice bathing and cold showers for people with cardiovascular risks.