>>2859261>if you are carrying anything heavier,NTA
Just how much weight are you carrying for a day hike (i.e. a few hours walking)?
My cheap chinky lumbar packs can do 2-3kg just fine, they don't have the space for an hatchet, or a silky bigboy.
But I can take 2x 1L of water, a large knife (TOPS Brakimo, BK2, but smaller knives are nicer to carry, of course) and a 20cm folding saw.
If you're going to take just a small knife, binos or something similar and a bottle of water, lumbar packs are great. And many of the larger lumbar packs have removable shoulder straps.
And I never had much trouble with it moving, I mean, it moves of course but never had problems with it rotating, if you get what I mean.
But if you actually need to take bulky or heavy shit, sure, grab a 25-35L backpack set the straps correctly and it's awesome. It's hard to argue against the number of points of contact of a backpack: shoulder straps, waist belt, sternum strap.
If you need ventilation, grab a pack with a trampoline suspension system (i.e. mesh and arched stays), sucks for internal organization as you have to contend with a full pack curve, but it's nice for your back sweating.
t. guy in southern europe who sweats like a horse.