You feel happier after a cold shower because the shock triggers a surge of mood-boosting neurotransmitters like dopamine, norepinephrine, and endorphins, activating your sympathetic nervous system and providing an energy boost, similar to a workout or coffee, while also offering a mental distraction from worries and potentially building stress resilience.
Once our skin adapts to the cold temperature, we get a surge of “feel-good” hormones, such as dopamine, serotonin, and endorphins, which will leave us feeling happy, relaxed, and mentally rejuvenated after a cold shower.
Take it slow: Start with 30 seconds of cold water. Work up to a minute and progress until you take a cold shower for two to three minutes. Alternate hot and cold: UCLA Health athletic trainers often recommend a contrast shower post-workout.
Additionally, due to the high density of cold receptors in the skin, a cold shower is expected to send an overwhelming amount of electrical impulses from peripheral nerve endings to the brain, which could result in an anti-depressive effect.
Here is the key: the colder the stimulus (water immersion, shower, etc.), the shorter amount of time you need to expose yourself to the cold. 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.
Cold water therapy takes neuroplasticity, the brain's ability to adapt and rewire itself, to the next level. The stress of cold exposure activates pathways that enhance neuroplasticity, particularly through the release of stress-adaptive hormones like cortisol in small, controlled amounts.
Engage in activities that make you happy or feel relaxed. This is thought to increase dopamine levels. Some examples include exercise, meditation, yoga, massage, playing with a pet, walking in nature or reading a book.
The disadvantages of bathing with cold water include potential heart stress, respiratory discomfort, and worsening of fatigue or Vata imbalances. It can be counterproductive when you're already cold, sick, or exhausted. Always ease into cold showers gradually and avoid them when your energy is low.
Although depression may occur only once during your life, people typically have multiple episodes. During these episodes, symptoms occur most of the day, nearly every day and may include: Feelings of sadness, tearfulness, emptiness or hopelessness. Angry outbursts, irritability or frustration, even over small matters.
Cold therapy, like ice baths, cryotherapy, and cold plunges, has been shown in a 2021 study to reduce neuroinflammation, which can contribute to symptoms like depression and brain fog.
It's called the 1-10-1 rule. It refers to you having one minute to control your breathing, less than 10 minutes for self-rescue, and 1 hour before you become unconscious due to hypothermia. Hypothermia is when your body loses heat faster than it can produce it.
After 30 days of cold showers, people often report increased energy, better mood, improved mental resilience, and sharper focus, alongside potential physical benefits like better circulation, skin/hair health, reduced inflammation, and muscle recovery, largely due to the body adapting to the stress and the activation of systems that boost alertness and metabolism, though individual results vary.
Moreover, repeated cold water exposure has also shown psychological benefits by improving mood, anxiety, and overall mental health including the release of stress hormones like norepinephrine (Nakamura et al., 2022; Pozos et al., 2001).
Anxiety disorders involve excessive worry and heightened arousal. The intense physical sensation of cold water immersion can serve as a powerful distraction from anxious thoughts, helping to break the cycle of rumination.
To get the most out of cold plunging, submerge your entire body, even your head briefly if you can. The total body dip exposes your whole body, thyroid and back of the neck, which elicits a more dramatic hormonal response.
Vitamin B-12 and other B vitamins play a role in making brain chemicals that affect mood and other brain functions. Low levels of B-12 and other B vitamins and folate may be linked to depression.
Euphoria often presents as an overwhelming sense of joy or contentment. In contrast, mania might start with increased energy levels, reduced need for sleep, and rapid speech. This distinction is vital because while euphoria can be a part of mania, not everyone experiencing mania will feel euphoric.
How long should your cold showers be? The optimal amount of cold exposure is about 10 minutes per week. After that, returns diminish. So if you divide that by 7 days a week, you only need to shower cold for 1-2 minutes per day to get the optimal benefits.
A cold plunge might burn around 100-200 calories per session, whereas a 30-minute jog can burn 300-500 calories. Plus, exercise builds muscle, which helps increase resting metabolism over time.
What are common cold plunge mistakes? Typical errors include starting in water that's too cold, staying too long, neglecting breath control, skipping warm-up, and ignoring the body's signals. These mistakes can cause adverse effects such as hyperventilation, high blood pressure, and cold shock.
In the brain, cocaine elevates dopamine levels, resulting in a euphoric feeling that is distinctive from the high and pleasurable feelings produced by other drugs.
Sex, shopping, smelling cookies baking in the oven — all these things can trigger dopamine release, or a "dopamine rush." This feel-good neurotransmitter is also involved in reinforcement. That's why, once we try one of those cookies, we might come back for another one (or two, or three).
Dopamine levels are most depleted by chronic stress, poor sleep, lack of protein/nutrients, obesity, and excessive sugar/saturated fats, which desensitize receptors and impair production; substance misuse (like cocaine) and certain health conditions (like Parkinson's) also directly damage dopamine systems, reducing its availability. Unhealthy lifestyle habits, especially those involving processed foods and lack of sleep, significantly deplete this crucial neurotransmitter.