While O'Grady's heart is giving him cause for concern by racing at 235 BPM, my heart rate has given me something different to think about.
I'm not on any meds, not even for recreational reasons ;) . My speed, cadence and distance does not varying greatly for similar workouts, those numbers are up a little if anything, but my heart rate is just not going up into the zone I have targeted for a given workout. This has come on rather suddenly over the last week to 10 days.
Any guesses or ideas if this might be related to old age, improved conditioning, a stale workout routine or something all together different?