Automatically edit lap distances when edit changes total distance

I have a Foreruner 220.

In the last 2 years or so, it hasn't been unusual for me to run indoors, on a treadmill. When I do, I turn off GPS off. It is not unusual for the distance recorded by my watch to be 30% to 40% short. After uploading these workouts, I edit the run to use the total distance as reported by the treadmill. Since I have the treadmill set on an incline, I also calculate the "ascent", and edit that.

Editing the distance doesn't change the distances of the laps. This results in the total distance run being greater than the sum of distances in the laps column.

My suggestion: When the total distance is edited, automatically and proportionally edit the distance of each lap.

For example, the treadmill recorded distance of a recent run is 8.01 miles. My FR220 estimated the distance was 4.16 miles. My Autolap distance is 0.5 miles.

8.01 / 4.16 is 1.92548076923. So, when I correct the distance, instead of each lap showing as 0.50 miles, they should each be about 0.96 miles. Except the last lap would be about 0.31 miles.

Since I do enter ascent, it would also be nice to have the total ascent distributed among the laps. Where reasonable, it would also be nice to have any other statistics affected by my edits recalculated. .

0 Adam-1972 3 months ago

Follow instruction, it should help.

https://www8.garmin.com/manuals/webhelp/forerunner220/EN-US/GUID-C5FA4630-92BE-4C85-AE15-E94FEA539B4D.html

https://www8.garmin.com/manuals/webhelp/forerunner220/EN-US/GUID-6F0D6F0B-73BF-4E23-8BD4-841B858CF96D.html

0 Jogger2425 3 months ago in reply to Adam-1972

As noted in the original question, I do turn GPS off when running on a treadmill.

Including a foot pod would help. One source of inaccuracy when on a treadmill is the result of halting or altering my arm swing in order to use my hands, such as when reaching for and drinking water. But, I have concerns the accuracy improvement would be insufficient.

I could achieve the same effect by wearing my watch on my ankle. But, that would make the watch hard to use during the run. Most importantly, I wouldn't be able to check my heart rate.

I could also turn autolap off. In a treadmill run where I run the entire distance at a constant rate, this would be sensible: Recording laps wouldn't be particularly useful. However, there may be other types of runs, such as intervals, when I would want to record laps.

0 Jogger2425 3 months ago

In addition to automatically editing lap distances when I change the workout distance, I would like to be able to edit individual laps.

0 Jogger2425 2 months ago

Editing the total distance should also automatically adjust the graphs. I recently ran 5 miles on a treadmill, but the watch recorded about 2.9 miles. Selecting "over distance" for the graphs show the graphs are based on the 2.9 mile distance.

0 Jogger2425 2 months ago

I had another thought: I can plug the USB charging cradle to my desktop computer, and browse the watch's file system. If I knew the format of the files where running data is stored, I could copy the workout files to my desktop computer, edit them, and then upload (import) them to Garmin Connect web.

Is there a place where the format of the workout files is documented?

0 trux 2 months ago in reply to Jogger2425

Jogger2425 said:
Is there a place where the format of the workout files is documented?

https://developer.garmin.com/fit/protocol/

0 FlowState 2 months ago in reply to Jogger2425

There's also a couple of apps to manually edit and automatically fix FIT files:

- https://www.fitfilerepairtool.info/ (not free, windows only) - this can pretty much do anything (especially when it comes to fixing corrupt files), as it's been continuously developed since 2012-ish, but it's paid only. You can try it out for free, but it will remove half of FIT file's data when you save an edited/repaired file.

- https://www.fitedit.io/ (free. windows, mac and linux) - "FitEdit can modify any FIT field: speed, heart rate, latitude, longitude, timestamp, and many others....Recalculate lap distances" You can also edit any of the other lap metrics, but it's not automatic (you'd have to do the calculations yourself). This tool is a bit more modern but it can do less than fit file repair tool. For the use case of manually editing laps, it should be fine.