Old 09-08-10 | 11:24 AM
  #17  
svtmike
Senior Member
 
Joined: Oct 2008
Posts: 2,745
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From: Chicago, IL

Bikes: S-Works Roubaix SL2^H4, Secteur Sport, TriCross, Kaffenback, Lurcher 29er

+3 on dehydration. I dehydrated badly on my last century (a brutal 100 degree day) and my heart rate was in the upper zones with power outputs down in the low 100W range. It wouldn't go below 155 or so just standing up.
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