I find if you're scared to shit a grizzly bear is going to eat you you don't notice the weight as much. Although, eventually you're thinking "aww eff it let's just get it over with."
Thanks for making that video, great tips!!! I think a lot of guys adjust their new pack without weight in it, but don't realize they need to re-adjust and fine tune it once they start packing a heavy load. So thanks for pointing that out.
Trekking poles definitely help ease some pain on the knees, and I’ve found if I tighten up the chest strap it helps keep my shoulder straps from spreading out and putting my arms to sleep.