Traveling earlier this month in Europe, I missed my daily swimming in the pool so much that I filled a bathtub in the hotel with water to the brim and got in. Now, it happened to be Frankfurt/Main in late fall, and the water was cold. How cold? I don’t travel with a thermometer but it was definitely colder than my Californian pool.
But I enjoyed it. I got in to my neck, and stayed for a while. As it turned out, I stayed too long. Although the rest of my body heated up soon after I had toweled myself off, an ice-cold area over my kidneys the size of a football stayed with me – literally for days.
Uh-oh! I had overdone it! And Sebastian Kneipp had told me so. He used to warn that one should not exaggerate cold exposure. And as difficult it is to give exact numbers for the time frame of “too much” – if one stays cold in the kidney area for days after, as it happened to me, one clearly has gone too far.
Originally, he had cured himself from consumption (tuberculosis) by jumping into the winter-cold Danube River several times a week. When he later tried his method on other people, he quickly realized that not every body was not made for such endurance test: The older people were, and the thinner, the less cold they could handle – and he adjusted his theories to this insight.
In Traditional Chinese Medicine “qi” is the life force, and is generated in the “kidneys”, which is actually what we call the adrenals. In Western Medicine it is known that that the adrenals produce a hormone/neurotransmitter called adrenalin, which is an energizer. If you stimulate the adrenals a bit, it will give you that desired energy jolt; if you over-stimulate the adrenals, you get a downer.
Now, after two weeks of down time, when I didn’t dare to face the cold again, I swam again in the pool today. The temperature was 15 degree Celsius (59 Fahrenheit). I only swam one lap – wasn’t brave enough for more.
One lap might be too short to induce brown fat in my body, but it was exhilarating, and when I got out, my kidneys felt fine! And I restarted in time to strengthen my immune system for the winter. Read More
Blog: On Health. On Writing. On Life. On Everything.
Swimming In The Cold
November 7, 2011
One aspect of my cold pool experience is that, every day, with my twenty-one laps, I am sucking up vitamin D - so to speak. The vitamin is manufactured under the skin with sunlight – or even just daylight, on a cloudy day.
There is not one vitamin D but several. The precursors are taken up with food – all vitamins D are fat-soluble, so a fat-free diet doesn’t do a thing for you. And then these precursors are metabolized under your skin with sun exposure. As we age, or with darker skin, we require more light to do the job.
And don’t think that “fortified” milk, yogurt or cheese will provide you with the right amount of vitamin D. They will only make any disease in your body worse because they are inflammatory. Also, there are several forms of vitamin D, your physician should supply you with a vitamin D preparation, particularly in the winter and particularly if you are living in the inner city where light might be filtered away by high buildings and smog.
Vitamin D is important for several reasons:
1. It protects you from all kind of cancers. And, please, don’t be afraid that you catch skin cancer from that short of an exposure – not more than twenty minute. On the contrary! The other mostly unknown fact about skin cancer is that vegetables protect you from skin cancer much better than a sunscreen. Disclosure: I don’t use any sunscreen, ever. I usually dress with long sleeves, long pants and a sun hat. But I don’t fool myself with sunscreen: They are not doing the job they advertise they are doing.
2. Sun and day light protect you from the so-called winter blues – Seasonal Affective Disorder (SAD). The more northern you live, the more at danger you are for depression, and the higher the incidence of alcoholism is. So, go out daily, at around noon, sun or rain, and fill up on light! You also get the exercise and the joy of walking in a park, or even just on a bustling street.
3. Vitamin D is essential for your bone health. Vitamin D is important for uptake of calcium and phosphorus, among others, from your bowels – without vitamin D the food or pill just passes you by. You also, of course, need a diet high in plant material so that you have access to all the minerals your body needs – because calcium alone doesn’t do a thing for your bones.
4. Vitamin D is essential for immune function - it protects your health in so many ways, not only against cancer. It also plays a role in warding off the common cold and the more dangerous flu. A virus alone can’t kill you – you also have to have a weakened body and a low immune function to make you susceptible to death and disease.
5. Insufficient vitamin D seem to lead to diminished intelligence and autism in children, and to dementia in older people.
6. The lack of vitamin D seems to be involved in the development of multiple sclerosis (MS). Being outside - especially in your youth - protects you.
7. Low vitamin D in your blood makes you more vulnerable to stroke – it is easy to see if you don’t eat fresh food and never get out of the house, that you immediately are at higher danger of vascular events.
8. Vitamin D seems to prevent or improve several other diseases like rheumatoid arthritis (RA) and asthma – and it protects against radiation damage.
All this I get from my twenty minutes in the pool each day. And that is apart from the cold stimulus and apart from the exercise I get.
Should we not start a movement making people use their unheated, underused pools more? – If I only knew how! I am such an apolitical person.
And I admit publicly: It is hard every day to walk into that cold pool. – But isn’t everything worthwhile hard? Like raising a family, doing your job day-in, day-out, learning a new skill – and being afflicted by a bad, possibly preventable disease? Read More
2 Comments
More About Brown Fat
November 2, 2011
My experiment is going on. Of course, I have no idea if it is really new brown fat that turns me into an oven every time after my daily cold laps in the pool. For all I know, I could have a not-yet-recognized infection or any other disease that makes me burn up. Only thing I know is that I feel terrific – for the moment.
But for the sake of an interesting exploration, let’s stick with my brown fat hypothesis. This is what I have learned about about brown fat so far:
1. It used to be thought that only babies (protecting them from hypothermia) or bears (keeping a reasonable core temperature during hibernation) have brown fat. It turns out that traces of brown fat are still around in adult people. – A little aside: Other ways to increase body temperature are increasing surrounding temperature, moving about, shivering, and eating certain “warming” foods like cinnamon, ginger, onions, garlic, rutabaga, coriander, cloves – interestingly foods often used in the winter kitchen. But there is no hint that those foods increase brown fat. Or a shred of a proof that a so-called "Brown Fat Diet" will increase that precious tissue in your body.
2. Brown fat can help weight loss by increasing metabolism speed.
3. Brown fat also can decrease elevated insulin-resistance (also called pre-diabetes) and a diabetic situation.
4. Brown fat can be induced to increase by cold exposure – be it by swimming in cold water, immersing in a tub filled with ice water, or dancing in a walk-in food refrigerator (don’t you wish you had one of those at home??).
5. Needless to say, there are already pharmaceutical firms are already working on drugs that might trigger growth of brown fat, without going through the ado of cold exposure. The easy way out, I call it. And definitely not an interesting way, if you ask me.
I like to think about cold-induced brown fat as one of the benefits of moderate stress. We all know that stress is bad for you, don’t we? Not necessarily though. Moderate stress might be what makes the body function in the way Nature intended it. With heated dwellings with forgo the winter cold stress – and get sick for it, lacking brown fat. With air-conditioning in the summer, we miss out on the sweating which give our body a good cleanse of all the toxins – and get sick for it. Occasional hunger stress (fasting!) is another beneficial stress mechanism. Not only do we get healthier on occasional fasting, and live longer with less belly ballast, it also seems we get to be happier with fewer pounds – and less depressed.
One estimate is that there are about three million residential swimming pools in California (I am not even mentioning the pools in Florida and all across southern U.S.A.). If these pools are anything like our pool here in La Jolla, all those turquoise eyes should be gazing at the sky, basically unused. All, of course, using up precious water resources. How about using them? If you are in decent health (ask your physician), you start by doing a single lap across your pool. Tomorrow two, and every day one more until you reach twenty-one laps. The brown fat will appear very fast – and will help you lose weight.
Putting on brown fat, however, might mean walking a fine line: You want to increase your metabolism by cold exposure. But you don’t want to get where most winter swimmers end up: with more fat on their bodies. Fat (of any kind) protects against cold, and makes you better able to withstand long swims in icy water. Don’t go there! Read More