The largest study with 3,000 participants was carried out in the Netherlands and found that people who took a daily cold shower (following a warm shower) of either 30 seconds, 60 seconds or 90 seconds for one month were off work with self-reported sickness 29% less than those who had a warm shower only.
The shock of cold water can stimulate the blood cells that fight off infection (leukocytes). One study in the Netherlands found that people who switched to cold showers for 30, 60, or 90 seconds for 90 days called out sick from work 29% less than people who didn't switch to cold showers.
In a clinical trial, researchers found that taking a cold shower for up to five minutes once or twice daily can help relieve symptoms of depression. Cold showers can also help clear your mind and combat overwhelm by decreasing your heart rate.
At the end of your shower, simply blast yourself with cold water for 30 seconds, followed by hot water for 30 seconds, and then finish with cold water for a final 30 seconds.
One study showed significant and prolonged increases in dopamine when people were in cool (60°F) water for about an hour up to their neck, with their head above water. Other studies describe significant increases in epinephrine from just 20 seconds in very cold water (~40°F).
Cold Shower Benefits
Like most people, you may prefer warm showers to cold ones; however, there may be some tremendous benefits you're missing out on if so. Showering in 50 to 60 degrees Fahrenheit water is considered a cold shower.
If you have any heart issues, it's best to talk to your doctor before starting cold showers. It's also possible to overdo the cold. "If the water temperature is too cold, below 10°C, and you take a long shower, you can get hypothermia.
After 30 days of cold showers, most individuals report feeling more alert, having more energy, having healthier skin and hair, improved mental health and resilience, improved circulation, and more. From my viewpoint, I noticed an increase in morning alertness every single day.
While warm bathing might cause a slight melatonin spike, ice bathing causes an even greater one. This is because scientists believe that melatonin production is stimulated not when the body heats up, but when it cools down.
Scientific studies have found that taking a cold shower increases the number of white blood cells in your body. These blood cells protect your body against diseases. Researchers believe that this process is related to an increased metabolic rate, which stimulates the immune response.
Keep it short: When first trying cold showers, aim to spend no more than 30 seconds under the cold water. You can increase the time as your body adapts. Ease in: Instead of jumping into a cold shower, start with the water warm, then gradually adjust the temperature downwards.
May Boost Your Mood
Past research reveals that submerging your body in cold water increases dopamine concentrations by 250 percent. Dopamine is known as the “feel-good” hormone because of the key role it plays in regulating mood, per the Cleveland Clinic.
It turns out that ultimately, no, a cold shower isn't bad for you. If anything, cold showers have proven to have many benefits, from increasing your mood, aiding weight loss, and increasing immunity.
Specific benefits: Cold plunging is more effective in reducing inflammation and muscle soreness, improving recovery time, and promoting weight loss. Cold showers are better for improving circulation and boosting immunity.
According to a study by researchers at Virginia Commonwealth University School of Medicine, taking cold showers for two to three minutes, once or twice a day (preceded by a five-minute 'adjustment period' of slowly cooling water) could help to relieve symptoms of depression.
Cold exposure helps boost metabolism and fat burning, but the effects of a cold shower are minimal. Sure, a cold shower might help you burn a few more extra calories and keep you more alert, but it is not a long term, effective solution for weight loss.
Cold showers might not improve sleep because of cold water's stimulating properties. Cold water immersion raises levels of cortisol and norepinephrine. View Source . Cortisol is involved in boosting alertness levels, and consequently, cortisol levels.
When you shower with cold water, it does not strip your skin and hair of their natural oils. Cold water closes pores, which tightens the skin. It is also gentler on your hair and prevents hair fall.
In general, the coldest a shower is likely to get is around 50 to 60 degrees Fahrenheit, although this can vary depending on the factors mentioned earlier. If you're trying to take a very cold shower, it's important to start slowly and gradually decrease the temperature to see how your body responds.
Cold showers and exposure to cold temperatures have been shown to increase testosterone levels, which can indirectly impact sperm count. Higher levels of testosterone can stimulate sperm production and increase the motility of sperm, which can improve overall sperm count.