I don't use trekking poles either, except when XC skiing or snowshoeing.
> It didn't take long for him to come up with the answer: skiers generated propulsion
> using all four limbs. the runners used only their legs
Lousy argument, based on a couple of fallacies.
The first reason for using ski stocks while XC skiing is that the snow is very slippery. The second reason is that while you can move your foot sideways slightly while walking, it is much harder to do this with skis on, so poles help your balance. In fact, both reasons are to do with balance, not propulsion.
But a major flaw in his argument is one of efficiency. Yes, you can generate propulsion using either arms or legs, but your arms are far less effective and efficient at doing this: they did not evolve for it like your legs. So if you are working at the limit of your capacity, it makes a lot of sense to put almost all your power output into the the strongest and most efficient body muscles - your legs.
However, if you are having trouble with dynamic moves or balance, then you may be able to use your legs more efficiently if they don't have to provide all the balance. That's why people with poor or injured knees find poles useful going downhill. But this is a very different case from nordic walking.
> A Heavyhand user can generate 50% of leg capacity, 50% of arm capacity and exceed
> the marathon runners 75% of maximum capacity using legs only.
If the original author of this statement actually understood what he was talking about he might not have come up with this drivel.
Let's assume, for the sake of the argument, that your legs are 4 times stronger than your arms. (The ratio may be higher.) 50% of 4 (leg power) is 2, and 50% of 1 (arm power) is 0.5. Total: 2.5. On the other hand, 75% of 4 (leg power) is 3, which is greater than 2.5. Not to mention the fact that your legs have greater endurance than your arms.
> The highest VO2 maximums ever recorded by a group of athletes were not registered
> by endurance runners,which is what he logically presupposed before his
> investigations, but rather by Russian and Norwegian cross country skiers.
Yeah, and if you look into the medical details you may find that many of those top Nordic skiers have a phenomenal VO2 capacity, well above that of the average athlete. They are just built that way.
Just because someone has an MD does not mean they have any understanding of Research methodology or of Physics. Some of the wildest crap I have heard has come from MDs operating outside their bedside field. (I am talking here about papers given at science conferences.)