I have not tracked down the whole paper yet, but I am curious about the definition of "recovery"? I had never seen stride height used as a metric for recovery. (Not that I read as much in this area as I once did.)
Yes, I had the same thought. That seems like a weird metric for recovery. I could believe massage helps loosen muscles up and help with running economy, but is that recovery?
This threw me also. Also, I have coached a lot of runners that have very different biomechanics while on a treadmill.