I found this issue on my FR35 before. Now, I found the same issue on my new FR745 as well.
A testing I did yesterday, ran with a metronome on the treadmill.
The testing steps were 180spm running 10min, walking 90s, 165spm running 5min, walking 90s, 170spm running 5min, walking 90s, 175spm running 5min, walking 90s, 180spm running 5min, walking 90s, 185spm running 5min, then walking for cool down.
The cadence diagram should be like the pic below
Unfortunately, the final cadence diagram showed as below
There were lots lower cadence in red during running, even lower than walking.
Those lower cadence cause the average cadence was extremely lower than normal. That's why I never got a reasonable distance when I did a running on treadmill. Doesn't matter how to calibrate my stride length in Garmin connect app.
I am not sure if it is only happened on my FR745. Hope to see a resolution.
