Tue, Oct-06-09, 09:04
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Registered Member
Posts: 126
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Plan: Zone, IF
Stats: 220/170/160
BF:25%
Progress: 83%
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Quote:
Originally Posted by coachjeff
Also..."Ultramarathon Man," Dean Karnasas lives on a paleo diet during training. He eats no grains. His training diet is moderately low carb.
But for him, a "training run" is most folk's idea of a marathon. It's only when he's running one of 100 mile or more races that he eats lots of carbs, during the actual run itself.
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I'm not in Dean's calibre but I've done marathons, 50 milers and 100 mile races. In his first book he lists all the foods consumed in a 200 mile relay run. Nearly all of it what this crowd would consider junk food: One pizza 4500 calories, one cheesecake 3000 calories, etc.
For a long time I followed the Atkins lowcarb doctrine and suffered poor outcomes in a lot of races. At his level, I would expect him to be burning a lot more fat calories on his long runs. I had a treadmill stress test in August. It showed that at a slow jog I was burning 25% carbs, 75% fat. The Krebs cycle requires a small input of sugar. When I was running 50 milers in ketosis, I was getting that sugar through gluconeogenesis, meaning I was breaking down muscle tissue.
The trainer who administered the treadmill test concluded that my 25% body fat is why I was still burning so much sugar in runs. Maybe because Dean is quite lean he burns a lot more fat calories than I do. But if that's the case, the high-sugar food he eats in races should dampen his ability to burn fat?
The trainer's recommendations included that I run fewer junk miles, add high-intensity runs, stretch a lot more (I never stretch) and include weight training. So far the weights have been difficult due to lateral epicondylitis in both elbows.
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