Cold water immersion (CWI), also known as ice bathing, is a common cool-down practice for athletes post activity. There is evidence that suggests physical benefits for the use of CWI post sub-2-hour activities.
This study sought to find out the effects of CWI on triathletes who had completed a 3.86 km swim, 180.25 km cycling, and a 40.2 km run. The cohort in the study had an average finish time of 11.5 hours.