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I have noticed an elevated heart rate after my 15 mile ride when I do not ingest any food beforehand. This elevated rate does not seem to end until after I have fallen asleep. I also feel fatigued afterwards. I eat afterwards as I am naturally very hungry but yet my heart rate stays slightly elevated until after I am asleep a while. This is whether I ride slow or really push it and go fast.
If I ingest a bottle of soda pop with 64 grams of sugar which is the equivalent of 240 calories there about I find that after the ride my heart rate quickly goes back to normal. In addition I do not feel fatigued when I return home. A representation of how much sugar that is shown here. It is significantly more than I put in any of the teas I have tried using in place of the soda pop
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There are only 2 things this can be:
- low blood sugar
- dehydration
Another symtom I was seeing was consistently waking up with a minor headache and of course not sleeping well.
I suspect it is probably due to the hormones required to pull energy out of fat tissue. This would not dissipate quickly once I return home even if I eat or drink till back on energy or water balance. The ride is much more pleasant when I drink the soda pop.
Update: Latest theory is that the glycogen levels in the liver store go down as I exercise. In order to extract energy from the liver at the same rate the heart has to flow more blood per unit time.
All I can say is thank god for sugary soda pops. They helped me learn about my body.
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