The participants were either randomised into cold showering for 30, 60, 90 seconds or a control group during 30 consecutive days followed by 60 days of showering cold at their own discretion.
Illness days and related sickness absence from work were recorded in the different groups.
Quality of life, work productivity, anxiety, thermal sensation and adverse reactions were also recorded.
By the end of the study, the researchers observed a 29 percent reduction in sickness absence for those following a cold shower regimen compared to the control group.
