Mweinstone,
I agree with you (Post #20), “Carrying trekking poles in your pack is twice as efficent as in your hands.”
I have a bad knee. I used two poles, one for each hand of course, and hiking felt great. I suspect I hiked too quickly going down hill and the injury recurred. Stopped the hike.
I then began carrying a pole on my pack, using it as needed.
Now, I don’t carry a pole. Mom Nature continues to provide me with a pole whenever I need it.