how does Garmin Connect calculate Normalized Power? I am able to convert a FIT file to excel and manually calculate NP to get what Training Peaks calculates but my Garmin 520 and Garmin connect consistently report higher.
I used a rolling 30sec average to the 4th power. Then took an average of them and took the 4th root. Again, same as Training Peaks. ANyone else notice this discrepancy?
I have uploaded the FIT file as well as a CSV conversion.