All my runs are “peak”

Just got a Fitbit last week. I’ve (39f) been running for decades and have a comfortable pace for my maintenance runs, which is what I run about 80-90% of my runs in. I average about 15-25 miles per week.

My Fitbit is showing my heart rate at “Peak” for about 60% of all the runs I’ve done since getting the Fitbit (5) and “Vigorous” for about 30% of them. I tried running at a much slower pace than my normal one (about 1 minute/mile slower), and wound up with similar results (that is the pic on this post).

I know Fitbits can calculate incorrectly, but this feels alarming to me! I haven’t experienced any problems by way of faintness/fatigue, my stamina is very strong, and when I end my long runs, I often feel I could keep going for a long time. I have, however, had several overuse injuries on the tendons on my left leg (ankle, hip, and possibly knee, though I suspect that was something else) when training for half marathons. However, I also was lax about strength training for those particular areas and have PT exercises that have strengthened all of them at this point.

My resting heart rate is about 55-58.

I’d love to hear your thoughts!

Just got a Fitbit last week. I’ve (39f) been running for decades and have a comfortable pace for my maintenance runs, which is what I run about 80-90% of my runs in. I average about 15-25 miles per week.

My Fitbit is showing my heart rate at “Peak” for about 60% of all the runs I’ve done since getting the Fitbit (5) and “Vigorous” for about 30% of them. I tried running at a much slower pace than my normal one (about 1 minute/mile slower), and wound up with similar results (that is the pic on this post).

I know Fitbits can calculate incorrectly, but this feels alarming to me! I haven’t experienced any problems by way of faintness/fatigue, my stamina is very strong, and when I end my long runs, I often feel I could keep going for a long time. I have, however, had several overuse injuries on the tendons on my left leg (ankle, hip, and possibly knee, though I suspect that was something else) when training for half marathons. However, I also was lax about strength training for those particular areas and have PT exercises that have strengthened all of them at this point.

My resting heart rate is about 55-58.

I’d love to hear your thoughts!