Advertise on Bikeforums.net



User Tag List

Results 1 to 6 of 6
  1. #1
    Portland Fred banerjek's Avatar
    Join Date
    Oct 2005
    My Bikes
    Custom Winter, Challenge Seiran SL, Fuji Team Pro, Cattrike Road/Velokit, РOS hybrid
    Posts
    10,645
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)

    BF docs, can you shed some light on this?

    No, I ain't insane enough to seek medical advice from a message board. I was just wondering why it is when you freeze your extremities to the point you can't feel them anymore, they hurt like hell when you get into the shower even if the water isn't that hot? However, if you let them warm gradually to the same temp in the air, there's no issue.

    Thankfully, I've only experienced this phenomenon with fingers and toes (mostly toes)......

  2. #2
    2-Cyl, 1/2 HP @ 90 RPM slvoid's Avatar
    Join Date
    Oct 2003
    Location
    NYC
    My Bikes
    04' Specialized Hardrock Sport, 03' Giant OCR2 (SOLD!), 04' Litespeed Firenze, 04' Giant OCR Touring, 07' Specialized Langster Comp
    Posts
    15,762
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Ever turn the lights on in the middle of the night?

  3. #3
    meep! legot73's Avatar
    Join Date
    Feb 2006
    Location
    Milwaukee, WI
    My Bikes
    2006 Kona Jake, 2005 Giant Lite Xtracycle, 2004 Trek L200, 1997 Specialized RockHopper FS, 1989 Trek 950
    Posts
    616
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I ain't no doc, but my reconin' says that blood that was diverted from surface tissue and extremities to keep the core warm is rushing back (aided by hot water) to cold, constricted vessels, swelling the tissue beyond its ability to stretch.

    Either that or its athelete's foot.
    Nothing says "in good times and in bad" like a good pair of fenders

  4. #4
    Senior Member
    Join Date
    Jun 2005
    Location
    Cambridge, MA
    Posts
    326
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    legot's explanation is pretty close to the truth. It's not just toes and fingers, if you have someone suffering from hypothermia, unless it's a very mild case rapidly rewarming them could kill them. The body isn't meant to shift gears that quickly. It's similar to how when you rapidly heat & cool metal it becomes brittle and breaks easily.

  5. #5
    Portland Fred banerjek's Avatar
    Join Date
    Oct 2005
    My Bikes
    Custom Winter, Challenge Seiran SL, Fuji Team Pro, Cattrike Road/Velokit, РOS hybrid
    Posts
    10,645
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by rknj
    It's similar to how when you rapidly heat & cool metal it becomes brittle and breaks easily.
    Kind of like the way they got rid of the T-1000 in Terminator 2 (except I believe a shotgun blast helped the frozen metal shatter)

    When I was little, I imagined everything hurt because my blood was so cold, it was like throwing an ice cube in water. Years later, I started to suspect that my fingers and toes weren't quite cold enough to shatter.......

    Legot's explanation sounds very sensible to me and definitely fits with my own observations. Do any of the docs think this line of reasoning is out of whack with reality?

  6. #6
    BF's Level 12 Wizard SingingSabre's Avatar
    Join Date
    Feb 2006
    Location
    Tucson, AZ
    My Bikes
    Diamondback Sorrento turned Xtracycle commuter
    Posts
    1,425
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    There are different pain receptors for different sensations. Pressure, temperature, and injury (cutting/shearing) are the ones that spring to mind immediatly. Making temperature ones really cold and then putting something warm on them will make them report a much larger gradient of temperature than if you let them gradually warm up.

    Kind of like riding with traffic reducing a collision speed from riding against traffic.

    Next time they feel painful, put some pressure on them. The receptors which report pressure and compression travel to the spine faster than the receptors which report pain and the ones which report injury, so pressure will effectively head them off at the pass ("Head them off at the pass? I hate that cliché!").
    Shameless plug (my sites):
    Work
    Photography
    Vanity
    Quote Originally Posted by Bklyn
    Obviously, the guy's like a 12th level white wizard or something. His mere presence is a danger to mortals.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •