Hi,
I use a footpod to run on an athletic track. When I run at 4:30 or 4: 45min / km, the distance accuracy is almost 100%. 1m / km error. But when I do fast series, the accuracy is very low (3:30 min / km, 30 meters error in 400m). How can I improve accuracy or calibrate for fast and slow paces? I have a Garmin and Stryd pedometer, I'm thinking of using each one for different paces as another option.