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Discussion Starter · #1 ·
Can any physiologist out there tell us if there is a proven relationship?

I have heard of "heartrate drift" during hard exercise, meaning an increase in heartrate over time during a workout at a constant level of intensity. Does this have anything to do with dehydration?

Thanks for any responses.
 

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Discussion Starter · #2 ·
MY aristotelian answer (I wish you could do "science" this way!)

Here is what makes sense to me (but what do I know; I was a philosophy major): Blood volume has some relationship to hydration. Let's say that dehydration at some point, under some circumstances, reduces blood volume. If the blood's ability to transmit nutrients remains a constant, then to get the same amount of nutrients to a muscle cell over a given time, my heart will have to beat at a higher rate to push a lower volume of blood around.

Comments from non-philosophy majors?
 
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