Roger,
The concluding paragraph of the the sportjournal study states:
"It is plausible that the ground reaction variables measured in the current study were compromised by the short duration of testing. In contrast to actual hiking, the average testing duration for the current study involved a practice period and thee successfully completed trials, which lasted a total of betwenn15 and 20 minutes. In normal hiking situations, the duration of walking is extended by several hours and as fatigue becomes a factor, the reliance on the hiking poles is likely to become greater in order to reduce the demand on the lower extremities. Further, greater dependency on hiking poles may become evident as the terrain changes from flat to incline, decline or lateral slant. Recommendations for future studies should encompass longer walking durations, inclined/declined walking, and lateral slant in order to more closely resemble actual hiking activity."
The study itself seems to have little to do with real hiking conditions outside of the lab.
>>"For that matter, if you go back a couple of decades, trekking poles didn't exist, and yet walkers still managed to get up and down mountains at high speed."
I go back more than a couple decades and admit that I did fine in the mountains without them. But since I started using Pacerpoles my experience of the act of hiking has become so much more enjoyable. Anecdotal, to be sure, but I go out there to have fun, not to test scientific theories.
It is possible that the use of trekking poles is still another example of the delusion of the masses. But, based on my experience, I think that there is a little more to it than that.