I run outside in an urban area where the GPS is too inaccurate to make it useful for data gathering. If it consistently measured the same bad distance I could at least use that for comparitive performance measurement but I can see variations of up to 30% in distance on the same 10K run which swamps any minor changes in performance . Ive seen +6 followed by -9 if i run clockwise followed by anti clockwise.
If i turn the GPS off is there still a way to gather performance data and V02 data by manually entering the distance ? I assume people on running machines are doing this. Is it effective and what is the method ?
Thanks