Cold-water swimming has become more popular in recent years. Many people believe it can improve mood, boost energy, and even help mental health. Now, a new study from the University of Chichester offers strong evidence that even a short time in cold water may bring real benefits.
The study, published in the journal Lifestyle Medicine, explored how different lengths of time in cold seawater affect mood. Researchers wanted to know whether longer exposure gives better results, or if a short dip is enough.
Cold-water immersion means placing the body in cold water, such as the sea or a cold bath. When the body enters cold water, it reacts quickly. Heart rate increases, breathing changes, and the body releases stress hormones. After this initial shock, the body may also release chemicals like endorphins, which can improve mood and create a sense of wellbeing.
In this study, 121 students took part. All participants reported experiencing low mood but were physically healthy and active. None of them had experience with cold-water swimming before. This was important, as it allowed researchers to study the effects without influence from past experience.
The trial took place at West Wittering beach in the UK. The seawater temperature was around 13.6 degrees Celsius, which is considered cold but still safe under controlled conditions.
Participants were divided into groups and asked to stay in the water for different lengths of time: 5 minutes, 10 minutes, or 20 minutes. Before the trial, each participant completed a mood questionnaire seven days earlier. They then completed the same questionnaire again immediately after leaving the water.
The results were very interesting. All groups showed improvement in mood after cold-water immersion. However, the key finding was that the five-minute group experienced almost the same mood boost as those who stayed in the water for 20 minutes.
This suggests that a short exposure may be enough to trigger the positive effects. It also means people do not need to stay in cold water for a long time to feel better, which makes the practice more accessible and less intimidating.
The study was led by John Kelly and Natalie Davidson from the University of Chichester, along with Joseph Delaney from Edge Hill University. Their work adds to a growing number of studies looking at how simple physical activities can improve mental health.
Cold-water immersion is not completely risk-free. It can be dangerous for people with certain health conditions, especially heart problems. The sudden shock of cold water can put stress on the body. That is why the researchers only included healthy participants and carried out the study under controlled conditions.
Looking at the findings, this study provides useful and practical insight. It shows that short, simple activities can have real benefits for mood. The large number of participants strengthens the results.
However, the study focused on young, physically active students, so the results may not apply to everyone. More research is needed to understand long-term effects and whether similar benefits occur in older adults or people with health conditions.
Overall, the study suggests that a quick dip in cold water may be a simple way to improve mood. It also highlights the importance of safe practice and proper guidance when trying new health activities.
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Source: University of Chichester.
