Your boss will be happy: The simple shower habit that may reduce sick days

Studies suggest a link between cold showers and a reduction of about 29% in work absences, but no significant decrease in actual illness was found. Adaptation to the habit varies, and research has not yet proven a strengthening of the immune system.

Studies examining the effects of cold showers indicate a possible link between regular exposure to cold water and a decrease in the number of sick days taken from work. One of the largest studies in the field recorded a reduction of about 29% in absences among participants who finished their shower with cold water. However, no significant decrease was found in the number of reported sick days, meaning participants were not necessarily less ill, but rather missed fewer workdays. The study by Lena Glaser of the University of Basel examined the effects of cold water exposure, and previous findings showed that people who incorporated cold showers reported fewer absence days. Adaptation to cold water varies from person to person, and extreme exposure is not required to examine the effects. The research has not yet conclusively proven that cold showers strengthen the immune system. The article suggests starting gradually and warns against extreme exposure, especially for people with medical conditions.