Cold showers were linked to 31% fewer sick days in a 12-week Swiss study. The study involved 719 adults aged 18–65. They regularly stood under cold water for 30–120 seconds. Water was as cold as their plumbing allowed, reaching 59°F (15°C). People in the study also reported feeling more awake and refreshed. Those who kept going described more drive and enthusiasm during the day. The report also points to a Dutch study from 2016. People switched to cold showers for 30, 60, or 90 seconds over 90 days. They called out sick from work 29% less than those who did not switch. That gives the Swiss finding some support from an earlier study. Still, fewer sick days does not necessarily mean fewer illnesses. The supplied report does not give the Swiss study’s total sick-day counts. It also does not clearly describe the comparison behind the 31% figure. And not everyone stayed with it: 735 adults enrolled, but 16 left early. These details matter when judging how much the findings can tell us. For our Cold Water Immersion community, this is evidence about showers, not soaking in a tub. It does not establish that colder water or longer sessions work better. Members already tracking this habit could compare session length, water temperature, and weekly sick days. Notes on alertness and how often the habit sticks could add context. Sharing those records can help separate an immediate refreshed feeling from longer-term patterns. What changes, if any, have you noticed in your energy or sick days since starting cold showers?