Correcting Starting Point

[HuckNo]

I forgot to start my Garmin until halfway into my ride. Is there a way to correct the starting point on an in-and-out ride where the start and finish points are the same?

[HuckNo]

That makes sense. Thanks, Maybenaught. 

[lopey66 · Accepted solution]

you would have to use another file(old) and split it then time shift all the times. Simply record a new activity from the start and to where you started to that missing point , there is site that has time adjuster & file combiner function https://www.fitfiletools.com/#/top you could then first adjust the time back and then merge that file with your file

[Maybenaught]

I don't know of a way to do this other than adding a separate "manual" activity with your best estimates of time, distance, etc. Even though it's an out and back, the stats of your out effort could vary from the stats of your return effort, so just doubling the activity wouldn't be accurate info.