In reply to ablackett:
> My feeling is that it isn't going to be any use during the majority of the race, but if you get all those numbers "right" then it might help you out on a flat sprint finish.
A flat sprint finish is just that - a flat sprint finish , regardless of what the numbers tell you might be the right thing.
Trying to assess cadence for anything other than road running seems a bit of a waste of time to me. Everything about the way you run is going to be determined by the terrain - rough, smooth, path, heather, grass, rocky, uphill, seriously uphill, flat, down, steep down. I don't see what's to be gained from trying to maintain a particular cadence over the course of a run. Better, surely, to work how to run on the different types of terrain.