Orthostatics: Heart rate and heart rate variability is a complex balance. We have pressure sensors that send signals to our brain, that in return sends signals to the heart to speed up or slow down. (sympathetic -fight vs flight or parasympathetic -rest and relax) good hydration and electrolyte intake may help, yet many people still need to transition more slowly... Moing from sitting to standing.
Answered 9/20/2013
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