So, something slightly concerning happened during my most recent VO2 interval workout… It was a running workout, but that’s mostly irrelevant to the question at hand.
I’m 36 years old… Generally my HR will climb into the 180-185 range during a VO2 interval. Every once and awhile, while reviewing my data after one of these strenuous workouts I’ll see a spike in HR over 200 which I’ve always attributed to the HRM malfunctioning… after all, historically they’ve been very short in duration and I haven’t noticed them until after the workout is completed while reviewing data.
My workout today was 12x400m… Everything was going great, but after the 10th rep I was curious and decided to scroll through the various data screens on my watch to check my HR… it showed 234 in that moment. I immediately assumed a malfunction (even though I’ve never had any problems with the HRM other than very short 1 second peaks) and manually checked on my neck. That’s when I became concerned… it was too fast to count; like crazy fast!!! I felt no worse or better than I would expect at this point in a workout like this, but decided to extend the break until it dropped to an acceptable level. When after a minute it hadn’t budged I said “screw it” And strided out about 150 meters which seems to have somehow jolted it back to a normal 185. I again checked manually and it was spot on as far as I could tell.
I should say that I am a very experienced athlete with 20 years of experience with these types of workouts… so, I know what feels normal. I felt normal, but decided to terminate the workout with 2 reps remaining based on the high HR.
Has anyone ever experienced anything like this? Should I be as concerned as I am? Thanks for any advice!