In the winter of 2019 I took a surfing lesson in Costa Rica. I fell in love–the sun and salt water on my skin, the beautiful view of the beach, the spray off the back of the waves, the loud crashing of translucent turquoise, and the feeling of power, ease, flow and grace as I stood on a board, using the energy of the earth to fly across water.
The problem was, however, I would be going home in a week to a landlocked part of the world that spends a lot of its months covered in ice.
It was depressing.
Then I met a girl from Toronto, a psychotherapist who worked at a clinic just down the street from my old one.
“You can surf in Toronto, you know”, she informed me.
Where? I thought, astounded.
“On the lakes!” She exclaimed.
I was flabbergasted–perhaps I could be a surfer after all. The beach bum lifestyle, the rock hard abs, the zinc oxide cheek bones, the chronically wet hair, watching the winds and tides and slipping out for a sun-soaked hour during a work break. Could this be true–could you surf the Great Lakes?
“The thing is,” she continued, “the surf season is from October to March”.
Oh.
Winter surfing.
It was still interested, though.
Back in Toronto, I waited for the next strong February East wind and headed to a surf spot I’d heard about on Lake Ontario. I was met with a crowd of black neoprene-clad surfers, soaked by water, wind and sleet. The elements were harsh. The stoke, however, was infectious.
Ok, I could do this, I thought.
My next stop was the surf shop. I purchased gear and the rest is history.
Not a lot of us are built to slip into near-freezing water during the frigid winter months to catch a few waves. Lake waves are harder to catch, the currents are strong, ice chunks are a thing to watch out for, and… it’s friggin’ cold! But, surfing is surfing. The lakes provide beautiful landscapes, just like the ocean, and the feeling of catching a wave and riding it is the same.
There’s also the benefit of body hardening.
We modern humans are very different from our hunter-gatherer ancestors. Our genes may be the same, but our lifestyles couldn’t be further apart. Down-filled jackets and central heating protect us from the discomfort of the elements. In a sense, our lives are temperature controlled.
However, our incidence of chronic degenerative disease has never been higher.
Body hardening practices involves exposure against natural stimuli, such as intense cold, that results in increased resilience–resistance to disease and improved health.
A 1998 study in QJM: an international journal of medicine looked at antioxidant production in German winter swimmers.
Winter swimming, just like winter surfing, is a thing. As of the 90s, there were 3000 Germans who participated in winter swimming clubs. They were known to experience a 40% reduction in respiratory diseases compared to the rest of the population, debunking the notion that if you exposure yourself to cold you’ll “catch a cold”.
The study looked at 23 male and 13 female who had been members of a Berlin winter swimming club for more than two years. On average they swam for 5 to 10 minutes on a weekly basis in water between 1 and 5 degrees celsius. Their blood levels of glutathione were compared with that of 28 healthy men and 12 healthy women who had never participated in cold-exposure body hardening therapies such as winter swimming.
Glutathione is our body’s main antioxidant. It protects us from free radicals (reactive oxygen and reactive nitrogen species, ROS and RNS, respectively) that are harmful to our cells. It is produced from three amino acids: glycine, cysteine, and glutamine.
Glutathione reduces oxidative stress produced by these free radicals that occur in cells as a result of their energy production, as well as toxins, pollutants and other stressors. A deficiency of glutathione is associated with an increased risk of cancer, accelerated aging, and other diseases, such as metabolic disease like diabetes and cognitive diseases like Parkinson’s. It decreases as a result of aging, chronic disease, toxin exposure, and chronic stress.
Elevating glutathione status has been shown to improve conditions like insulin resistance, autoimmune diseases, cognitive and mental health conditions, fatty liver and cirrhosis, autism, and respiratory diseases.
It was found that after cold water exposure, blood levels of antioxidants like glutathione decreases, indicating that cold water exposure induces oxidative stress on the body. However, after a period of time, glutathione levels rose higher than that of baseline.
Baseline blood levels of glutathione were higher in cold water swimmers, indicating that their bodies were more efficient at producing glutathione in response to the temporary oxidative stress imposed on them by the cold exposure.
In essence, “what doesn’t kill you makes you stronger”.
This is called hormesis: when temporary stress is imposed on our bodies, we respond with adaptive measures, such as increased glutathione production to combat that stress. However, our bodies are smart. They figure that if we’re exposed to some cold stress, there might be more coming. Therefore, it might be a good idea to invest energy into hardening, preparing for more of that same stress in the future and, in essence, becoming more resilient. And so, when exposed to a stressor, we often produce more antioxidant than is needed to simply overcome that stressor, and this results in an overall net benefit to our health and well-being.
Just like lifting weights makes us stronger for the next time we lift weights, we become stronger and more resilient at our baseline as we prepare for the next hit of cold, heat, exercise, or stress.
The 1998 study also revealed that cold water swimmers had more enzymes that combat free radicals such as superoxide dismutase, glutathione peroxidase, and catalase, meaning that their cells were better prepared to ramp up antioxidant production quickly and neutralize free radicals at a moment’s notice, if needed.
Cold water swimmers also produced four times more norepinephrine after their cold exposure. Norepinephrine is part of our fight or flight response, but is also associated with increased energy, mood, motivation and well-being. Imagine a hit of caffeine–that’s a bit what cold burst can do to you via norepinephrine. Heart race increases, and we’re filled with an excited euphoria.
Norepinephrine is part of the reason why cold therapy has been touted as a remedy for depression. Cold exposure provides a much-needed burst of mobilizing chemicals to kickstart feelings of well-being and motivation for people who are struggling with low mood and arousal.
Cold therapy also increases dopamine by 250%, according to a 2000 study in the European Journal of Applied Physiology. Dopamine gives us the sense of motivation and meaning in pursuing a goal. It fills us with purpose and drive. So many of us are starved of dopamine and therefore so much of our culture involves trying to increase dopamine: scrolling social media, consuming sugar, playing video games, and so on.
The problem with many of these attempts to boost dopamine is that they come with a cost. We get a hit of pleasure from consuming sugar, for example, followed by a dip in our baseline levels of dopamine. Overall, we’re left feeling empty, foggy, purposeless, and addicted. We experience cravings that need to be filled.
Even supplements like Macuna pruriens and l-tyrosine, designed to boost dopamine levels, result in crashes 30 to 45 minutes after they peak.
Cold exposure, however, gives us a hit of dopamine that remains elevated for hours without a resulting crash. This provides an intense boost to mood, motivation, cognitive function, concentration, focus, purpose and drive. Like norepinephrine this can also contribute to cold therapy’s anti-depressive effect.
It seems that if we engage in something hard and uncomfortable, something that requires effort–like cold exposure–our body rewards us with an increase in mood, motivation and drive through the enhancement of dopamine production in our brains.
Winter surfing has been an immense gift to my health and well-being. It’s given me purpose, community, exposure to nature, and a wonderful outlet for body hardening. If I go more than a week without a surf session I start to feel a bit of withdrawal. There is nothing more therapeutic than hours spent checking the forecast, and driving to chase waves in order to end up floating in the middle of a beautiful lake, surrounded by nature and friends.
With regular winter surfing I feel invigorated, energized and fit–the mood-lifting effects of the cold exposure is comparable to nothing else.
This winter my message to everyone is: get outside. Exposure yourself to cold. Expose yourself to nature. Use the elements and the changing seasons as tools to enhance your health.
There are incredible mood-elevating, immune system-boosting and anti-aging benefits to becoming more resilient. While it may be uncomfortable, cold adaptation is a sign of your improved vitality and disease resistance.
Nature’s harshness evolved us. Temperature extremes helped to shape our DNA. Our genes contain codes for amazing mental, emotional, and physical resilience. They are waiting to be turned on at a moment’s notice, if only they’re given a reason.
Cold exposure flips the on-switch to your body’s incredible superpowers. Let’s explore the potential of this beautiful vessel in which we all live.
References:
Šrámek, P., Šimečková, M., Janský, L. et al. Human physiological responses to immersion into water of different temperatures. Eur J Appl Physiol 81, 436–442 (2000). https://doi.org/10.1007/s004210050065
W.G. Siems, R. Brenke, O. Sommerburg, T. Grune, Improved antioxidative protection in winter swimmers, QJM: An International Journal of Medicine, Volume 92, Issue 4, April 1999, Pages 193–198, https://doi.org/10.1093/qjmed/92.4.193
Image: Dean Weare at www.dweare.com
