Note
(sick)
Stress Test #3 this time I managed to produce "result" - got further than previously but not quite as far as I wanted. Retain my views on the standard Stress Test - this is what you will do... but that doesn't produce my symptoms... then you are FINE. NO I'm NOT.
Anyways got HR up to184 without problems but then couldn't hold the gradient so didn't get to the tipping point but enough of an indication of the probable cause of "turns".
Consequences - back to GP to decide whether i just not push so hard and avoid issues or go onto medication to "negate" the side effects and push if I want or need to.