Hey Primetime: Sorry for repeating your original message. I'm new at this. I joined the forum so I could reply to your message and others similar to it. For most of my life, I have had symptoms very much like yours. As a teenager and young adult (I'm now in my fifties), following vigorous exercise or athletic activity, my body would not return to normal. My cardiovascular system continued to act as if I was still exercising. It made sleep difficult for one or more nights, and eventually I would become exhausted from the constant overstimulation. From what I have read in recent years, I suspect that my adrenaline or noradrenaline receptors "hang on" to these hormones too long or that there is a way for the body to clear these hormones when they are no longer needed, but that system does not work properly for me. Because of this response, general anxiety is also a problem, a big one at times. I take different meds that basically slow my body down, but if overdo it with exercise, lack of sleep, or poor eating, the symptoms return, no matter how much the meds help. If anyone here knows the specifics of this type of dysautonomia, I would appreciate learning more about it. I know some work on this has been done at the Vanderbilt Dysautonomia Center, but other sources would be helpful as well. Thanks, Robert