I'm a brand new FR 645 owner and would love a way to set my units for track work to meters and my units for road and trail runs to miles. So really this is a feature request. I'm surprised there aren't a lot of people with this request, but searching the forum I couldn't find any discussion of it. If you'd also be interested in this feature, I'd love to hear from you on this thread.
Sure I can set my lap distance to 0.25mi, but that's not very satisfying when I'm working hard to shave a second or two off of my 400 intervals. How many seconds did that extra 2.3 meters take me? What about when I'm pushing to finish 1200 intervals in under 4:30? What's the adjustment for that?
Another alternative is to go into settings and change the units for the whole device to km before every track workout. There's two problems with that, though: 1) who wants to do all that extra button pushing every time they're ready to start their track work, and 2) it's very frustrating when I forget to switch it back to miles before I do my next road or trail run.
I noticed a year ago that my wife's FR 35 didn't seem to have this feature, but I hoped for more from the new 645.
Billy