Watch metric
Grade Adjusted Pace (GAP)
Grade Adjusted Pace (GAP) Definition
Your pace adjusted for the hills โ an estimate of what your effort would equal on flat ground. Best known from Strava, but it appears on watches too.
It is meant to remove any elevation from your pace, and give you how fast or slow you would have run had the run been completely flat.
A bigger difference in your Grade Adjusted Pace vs your actual pace generally means you were going really downhill, or really uphill.
When it helps
For comparing efforts fairly across hilly and flat runs.
When it doesn't
On flat runs, where it matches your real pace and adds nothing.