My gym has two leg presses: one that swings out like a pendulum and one that travels on rails. For some reason, I'm one of the very few who uses the pendulum leg press, nearly everyone in the gym uses the other. I tried using the rails one and it felt like I was being crushed by the weight, and felt like I had to put in more effort to even move the weight in the first place due to the movement being constricted by the rail's path. I can do 4plates for 3x12-14 no problem on the pendulum but almost failed out with 2plates doing 3x8, that seem normal?