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Old 05-30-12 | 10:11 AM
  #68  
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Nightshade
Humvee of bikes =Worksman
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Joined: May 2004
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Originally Posted by bobthib
I did the 50 mi club ride to Boca Raton today. I was ride leader, but I bonked at about 38 mi on the ride home and did the last 12 mi solo. Bonked on the same ride last week at about 35 mi.

I'm on a low calorie high fat diet and while I'm in Ketosis, I'm still 2-3 weeks from being fully keto-adapted.

On thing I did notice was the effect of fat metabolism being much less oxygen intense than carbohydrate metabolism. On the ride home though the park we were doing 24-25 and I looked and my HR was 88 - 92% max, but I was hardly breathing. Normally at that effort level I would be sucking wind bad.

Once I'm fully keto-adapted I should be able to maintain a high level of effort for extended periods. I want to be ready for some grueling rides in upstate NY in the mountains. It's a real change from the billiard top riding I do here.
If you insist on following your present diet you're in for trouble every time on long bike rides. You need carbs to fuel your body on long rides not fat.
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Steel: nearly a thousand years of metallurgical development
Aluminum: barely a hundred, which one would you rather have under your butt at 30mph?
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