Thread: 100+ temperatures
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Old 08-17-20 | 10:14 AM
  #153  
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big john
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From: In the foothills of Los Angeles County
Originally Posted by BHG6
A couple of weeks ago I decided to see how much fluid I'd lose over the course of an average ride in these higher temperatures. The temp was hovering around 100 when I left and I ended up losing a full 6 lbs in 2 hours/42 miles (I'm 6'4 215 lbs)
Since 1 liter of water weighs 1 kg, 6 lbs comes out to 2.72 liters of water. Add the 1 liter of water I drank along the way and I lost just under 1 U.S. gallon of fluids in two hours.....

Needless to say, I gained the weight back pretty quickly
5 or 6 pounds is typical for me on a hot ride of 5+ hours. The time I came home 11 pounds lighter I really felt bad. I start off around 200 these days.

It's not just sweat, we lose water through breathing, too.
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