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quick google
https://outdoorswimmer.com/guides/cold-water-science-and-nutrition
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Scientists took 11 male subjects and had them perform 45 minutes of exercise on a cycle ergometer machine, all the time submerged under water where the temperature was set at either 33 degrees Celsius or 20 degrees. Following 45 minutes of exercise test subjects were then given free access to a standard assortment of food where the caloric value of each food was known. Energy consumption was measured and the results revealed subjects in the cold temperature test consumed 41 per cent more calories than the neutral, control group.
"Hmm, not sure about that. It just means that the colder group gobbled more food, who knows if they actually expended 41% more energy during the exercise.
But a typical pool is 26-28 deg C, not 20 deg C.
Hmm, more #magnets required I think.
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https://www.wired.com/2013/02/ff-cold-weight-loss/
Not the most scientific of articles but an interesting read nonetheless.
It makes sense that your body would need to work harder to maintain your core temperature if your body heat is being stripped at a faster rate. Increased heart rate, shivering, etc.
I feel this would have no practicalapplication to me at present though, too well insulated from the elements with winter fat....
However there’s a great big load of water providing resistance in all directions(?), which running does not have.
Can you tell I was shit at science in school?