Had a really good 10 miler last week (tarmac-sorry). Fine all week, no problems. Felt a bit crappy yesterday, pulse was all over the place, felt like it was sending morse code. Went to bed, hoping I would wake up in the morning, obviously I did. Felt okay but pulse still erratic and it still wouldn't register on my HRMonitor.
Went for my veggies at the local farm, watched some kids from my school in a local race and returned home. HRMonitor on and hey presto, it registered 48 bpm. I'm usually between 40 and 48 normally. It's been fine for the rest of the day. Been out for a walk-jog, no problems. Any ideas?
I do have a Low White Blood cell count. Fighting a virus?