Cold shower (cold plunge) is a great way to reduce inflammation, speed up recovery, better manage stress and anxiety, improve flexibility, and more.
In this article, we explore 9 potential benefits of ice-cold showers.
1. Increases energy levels
Exposing the body to low temperatures for a short period of time causes changes in hormone secretion. For example, studies have shown that norepinephrine release increases during cold exposure. (Norepinephrine is one of the hormones responsible for regulating focus and energy.)
2. Improves recovery
Studies have shown that exposure to cold can increase oxygen-rich blood flow. As a result, it speeds up muscle recovery and reduces muscle soreness.
This allows the body to repair muscle damage more quickly, which can promote muscle growth and reduce the risk of injury.
When you are exposed to cold water, the central nervous system causes blood vessels in the extremities to constrict so warm blood is directed to vital organs. As a result, circulation in the arms and legs is temporarily reduced.
However, after leaving cold water, blood vessels dilate, increasing blood flow to muscle tissues in the limbs and skin.
3. Triggers hormesis and improves resilience
Exposure to extreme temperatures makes your body more resilient. This is because the initial shock of heat or cold exposure allows the body to adapt through a process called hormesis and become stronger.
In many ways, the body adapts to cold in a similar way to how it adapts to intense training. It is uncomfortable at first, but as the body adapts, it becomes stronger.
4. Improves mood
When you get out of cold water, it feels like you’ve overcome a weakness. This gives you a sense of accomplishment.
In addition to this psychological boost, there is also a biological effect: endorphins and other neurotransmitters, including norepinephrine, are released.
Studies have shown that low levels of norepinephrine (NE) are associated with depression and other mental health disorders.
5. Better stress management
As mentioned above, exposure to cold water activates your sympathetic nervous system—the “fight or flight” system.
Being able to regulate this system improves your ability to manage stress. Over time, this may be reflected in your heart rate variability (HRV), a proxy measure of autonomic balance.
6. Improves sleep quality
Many people struggle with falling asleep (or staying asleep) due to elevated cortisol levels caused by stress.
By learning to better manage stress and entering a calmer mental state, especially before bed, your chances of better sleep increase.
7. Helps fat burning and improves insulin sensitivity
Cold exposure activates brown adipose tissue (BAT), which helps regulate metabolism, clear blood glucose, and improve insulin sensitivity.
Researchers have also found that intense shivering increases reliance on muscle glycogen. While this may be harmful for performance if done right before competition, it can be beneficial for improving insulin sensitivity.
As a result, cold exposure combined with exercise and proper nutrition may help with weight loss.
8. Strengthens the immune system
Full-body cold exposure increases plasma glutathione levels, an antioxidant that plays a key role in T-cell function. It also activates natural killer (NK) cells.
Studies have shown that cold-water swimming causes significant changes in blood cell composition, including increases in red blood cells, white blood cells, and platelets.
As a result, cold showers may help strengthen the immune system and improve its ability to fight pathogens such as viruses and bacteria.
9. Improves cardiovascular health
Cold water causes blood vessels to constrict, temporarily increasing blood pressure and reducing blood flow to the extremities while directing more blood to vital organs (including the heart).
When you get out of cold water and warm up, blood vessels dilate and circulation increases. These changes can support cardiovascular health.
If you have been diagnosed with high blood pressure or are taking blood pressure medication, consult your doctor before taking cold showers.
Who should not do cold plunges?
- People with heart or lung disease
- Elderly individuals (should consult a doctor)
- People with diabetes (should consult a doctor)
- Pregnant women
- People with high blood pressure
Let’s summarize!
The benefits of cold showers are significant and make them worth trying. The ideal water temperature is between 10–15°C. You can go colder, but consult a medical professional first.