A short immersion in cold water can significantly improve emotional well-being. This conclusion was reached by researchers from the University of Chichester. The results of the study were published in the journal Lifestyle Medicine (LM). The study involved 121 students, all of whom reported low mood. Participants were divided into groups and asked to immerse themselves in seawater at a temperature of about 13.6 °C for 5, 10, or 20 minutes. Mood levels were assessed one week before the experiment and immediately after. Improvements in well-being were recorded in all groups, with the five-minute immersion proving almost as effective as the longer durations. According to the authors, even brief exposure to cold can trigger the body's adaptive responses — including the activation of the nervous system and the release of hormones associated with alertness and the stress response. This may explain the rapid feeling of energy and mood enhancement following the procedure. It is important to note that the study was conducted among physically active individuals without chronic diseases and under the supervision of specialists. The researchers emphasize that such practices may be contraindicated for people with cardiovascular and other health conditions.