Originally Posted by rsbob

Don’t have any direct proof, but after my last heroic attempt to beat my best time (3 days ago) on a 1 mile hill 1000’ climb, put me into Bradycardia (heart rate lower than 60 BPM - and mine is 42 and as low as 25). Spent 6 hours in the ER and an overnight on the telemetry floor. The worst part was an IV stent in my left arm, and blood draws every 4 hours which made for a virtually sleepless night. Had a full battery of tests and it is determined to be an electrical issue which is hopefully TBD after two weeks of wearing a Zio monitor. In the meantime, no ‘strenuous’ activity, and no excessive sweating, so it will probably be Zone 1 and no hills. And in the future, no more red-lining. Again, no direct proof, but was absolutely fine prior. Let’s be careful out there.

EDIT: Last night before bed and this morning my BPM rates are thankfully back to norma - high 50s to mid 60s. That doesn’t mean I’m going to head out and be crazy, but at least I know I am heading the right direction. My hunch is inflammation/arrhythmia was caused by reaching too hard and rest has caused it to re-set. But that is just my hack guess. Will still get my chest monitor read and talk to a professional. Perhaps a stress test would be telling.