To start, as a rough average, two out of three people I come across that have poles , don't use them correctly..
That gives me a good indicationof why "they don't work" for some.
Not that I think everybody should use them.
For me they work when I have at least 10kg on my back, particularly on reasonably steep gradients.
From Nik
Granted, people with lingering injuries or aging joints may find them extremely valuable, and allow them to hike where they might not be able to do so without them. Folks who use them because they are overweight would probably be much happier if they shed the excess pounds and left the poles at home
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Well I don't have any lingering injuries , nor particularly aging joints and I don't think I am all that overweight, but they work for me…
those poles*
From Mike
Some of us non-desert living folk find them a great help in river crossings, snow fields, shelter support, etc, etc,….
Me too…
From Craig:
But as a runner, here's what I don't understand:
Just about any running coach, especially those who specialize in distance running and achieving efficiency, will tell runners to keep arms, shoulders, and hands as relaxed as possible to conserve energy and maintain a smoother form. Any distance runner knows that excessive tension in the arms, shoulders, and hands, especially over long distances, is tiring, if not painful.
Trekking poles seem to run totally contrary to this idea of conservation, yet somehow are claimed to boost efficiency
Very simple (for me…) It is much easier for me to go up steep hills as well as coming down if I have some weight, see premise, with poles than without.
I started mountain walking when I was 5 or 6 , 50 years later I think that I have a bit of an idea of what works and what doesn't, for me.
If it is or not "scientific" I really don't care… but again this is me , others can feel free to disagree.
BTW, ever noticed how "science" changes its mind every few years ? (what works ,what does not? )
I just listen to what my body is telling me.
Franco
*Addressing directly the OP's question, yes those GG poles (about half of the weight of mine) felt a lot lighter in use and at the end of the day my arms were less fatigued.
In fact that is when I discovered that my arms do become fatigued.
I alternated using my BD and those GG for a few days.
The reasons why I then carried on using the BD were because I love the simplicity and reliability of the Flick Lock (I adjust them as I go up and down) and yes because I don't want them to fail on me during a river crossing (I can't swim…) nor holding my shelter up.