I've often read and heard that you can only build more muscle-mass (get stronger), if you continuously increase the resistance weights (e.g. here). But for me, it's the case that I'm often not able ...
I've always heard hardcore lifters saying that resistance is not the same as weight. Bascially that 100lb of resistance is not equal to 100lbs of weight. Imagine a bowflex vs a cable machine. I'd ...