I have also wondered if incline might be computable from the path and SRTM data, but thinking the precision may be insufficient. It could also be computed from recorded GPS data (GPX recordings), again not sure about sufficient precision for a peak, but probably good for averages. There is an open source project which proposes to do this GIScience/osmgpxinclinecalculator or maybe the JOSM plugin ElevationProfile could be modified to do this too. In either case, this would be a significant development effort and learning curve for me personally.
This approach could address the incline parameter (and probably also the total distance and elevation change), but it couldn’t address obstacles and use of hands as independent factors.

Thanks for the suggestion. I hadn’t explored creating a wiki user page, but I have put this content there also TroyH User Page