<human>: Right so a while back I had to register with a new GP, which required a routine check up. I expected this to be a five minute ordeal for their records, but they found I had a fast pulse and this needed a closer look. Within a two month period, I had a blood test, an echocardiogram and a 24 hour ECG, and finally my results.

I'm a bit of a hypochondriac, so this time period was very stressful. As far as I was concerned I was potentially living in a broken body and I became hyper aware of my heartbeat. I couldn't handle the idea of something being wrong with one of my most important organs, so when I had the 24 hour ECG it wasn't a typical day. I intentionally exerted myself as little as possible. I got up slowly. I walked around slowly. I only got up to go the toilet and to eat. I even had a nap for a couple of hours early that evening.

My results were that the blood test, echocardiogram and ECG were all fine, my heart must just be sensitive to certain postures, and it's atypical but ultimately harmless. Which was a relief for half a day until I considered my behaviour during the ECG.

Give me the gist of the text in a nutshell
<bot>: can doing as fuck all as possible during a 24 hour ECG mess with its results? Or does it work independently of that?