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  1. #26
    Join Date
    Oct 2003
    Location
    slc
    Posts
    10,888
    Quote Originally Posted by Lindahl View Post
    Why does that make a difference?
    Open water swimming is a whole lot more challenging than pool swimming, for reasons that I think would be obvious. As for the cold part, there's lots of research out there now showing that cold exposure improves a number of metabolic health parameters including insulin sensitivity, glucose tolerance, VO2max and RER. Cold exposure also stimulates mitochondrial biogenesis in both fat (i.e., conversion of white adipose tissue to brown adipose tissue) and muscle, stimulates endogenous antioxidant and anti-inflammatory production, and improves immune function. Lots of info here: https://www.foundmyfitness.com/reports/cold-stress.pdf

    Heat stress also has been shown to have many beneficial effects on the body (most from sauna studies). Temperature stress in either direction creates a beneficial hormetic response, but the reading I've done indicates that there are some unique benefits to cold.

  2. #27
    Join Date
    Jan 2008
    Location
    truckee
    Posts
    11,073
    Quote Originally Posted by Dantheman View Post
    Open water swimming is a whole lot more challenging than pool swimming, for reasons that I think would be obvious. As for the cold part, there's lots of research out there now showing that cold exposure improves a number of metabolic health parameters including insulin sensitivity, glucose tolerance, VO2max and RER. Cold exposure also stimulates mitochondrial biogenesis in both fat (i.e., conversion of white adipose tissue to brown adipose tissue) and muscle, stimulates endogenous antioxidant and anti-inflammatory production, and improves immune function. Lots of info here: https://www.foundmyfitness.com/reports/cold-stress.pdf

    Heat stress also has been shown to have many beneficial effects on the body (most from sauna studies). Temperature stress in either direction creates a beneficial hormetic response, but the reading I've done indicates that there are some unique benefits to cold.
    Probably best for beginners to stick to the pool though. Given the calories burned in open water swimming the amount of food someone like Lynne Cox eats to maintain her significant body weight must be staggering.

  3. #28
    Join Date
    Oct 2006
    Location
    Bellevue
    Posts
    5,139
    How does one get into open water swimming? Just go down to the lake and start swimming? Seems unforgiving.

    When I was a lifeguard there was a guy who showed up and just swam, never fast but he was there the entire open swim session. Found out later he did some race across lake Tahoe

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