| Earnest |
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Could someone please explain the physiology behind the huge increased I have noticed in my heart rate since reducing my daily carbohydrates from 300-500g to 5-50g (and these all from vegetables)? I have been doing this for two weeks now. My resting HR used to be 39-41. Now it is 58-65. My pace at 155 HR used to be 5:55 m/m. Now it is 8:10 m/m. Is this an indication that a low-carbohydrate diet is less than ideal (at least for my metabolic profile)? I was under the impression this dietary change would lead to greater endurance by shifting my metabolism toward fat but I am just not seeing it. Thanks. |
| asfsdaf |
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yeah it's your body telling you to knock that s*** off ASAP. Seriously though a big jump in resting heart rate usually means overtraining or sickness. Probably from inadequate recovery due to inadequate carbohydrates. |
| Earnest |
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Yes, I don't see how this can be a good thing. I was thinking about the overtraining response as well. Who knew low-carb would generate the same kind of stress? I mean, this is crazy. I am getting winded just by jogging. I have heard this "carbohydrate intolerance" test is a great way to shift your metabolism but I am getting skeptical to say the least. |
| the porcupine saddle |
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Not sure if that applies to faster runners b/c they are generally already pretty fat-adapted. |
| Earnest |
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Right, that is what I was thinking. I know that Maffetone has used this method successfully but I think most of the subjects were slower than 9:00 m/m to begin with. |
| Earnest |
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What about this? http://jap.physiology.org/content/100/1/7.full |
| been there before |
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The article is interesting and does provide some compelling points (I skimmed it). However, if you are going to transition fast like this, you need to do it gradually and decrease your mileage. I strictly reduced carbs one summer training for cross country, sometimes I would get so tired I would have to stop from light headedness at the top of a hill. I did get faster, but I always felt terrible. The next year I went for more of a balanced diet and was able to sustain a much higher training load. Glycogen replenished means you can go farther faster (usually). |