I knew I'd done too much in the past couple of weeks. I kept my heart rate under the magical tipping point, but still, here I am. Another difficult lesson. I had developed a false sense of security while wearing my HR monitor - I fooled myself into thinking that if I just kept that number down, I wouldn't crash .... and I got cocky and pushed my limits. My monitor screamed at me and I ignored it. I have a love-hate relationship with that thing. So here I am, vertigo, vomit, diarrhea, tremor, HA, and all the other crap we know so well. Another crash. Another hole from which I must climb. Another chance to lie in bed for an unspecified period of time, worried that this one will stick. Any suggestions on how to (properly) use and respect the HR monitor? 'Cause apparently I have no idea.