I have just started investigations for POTS And during my ECG A slight abnormality showed up and I have received a letter saying I need an exercise tolerance test. Really don’t want to do this as I’ve just crawled my way back To the level I was last July. (Bad crash due to a 2 week holiday...stupid idea I realise now!) Has anybody else had experience of this test for cardiology? I’m planning to ring the hospital and find out as much as I can about duration etc but can’t until Monday.