All the actual data from the ride is saved, but when looking at it in various software packages (training center, ascent, motionbased, etc) you can set the threshold at which it doesn't include the data in "moving averages". That way you can see average speed, % of moving time at various HR zones, but still, for example, compare total time vs. moving time. I have Ascent set to ignore everything below 5 mph except for total time.