I have problems with keeping my back arched in the bottom of a squat. A guy in the gym told me to try and keep the torso upright to solve the problem so this is what I focused on for a while. Recently I found out that either I understood the guy wrong or he gave me the wrong advice because I squat low bar. I never knew that I should actually focus on leaning forward more while trying to maintain an arch, when I have the bar low.
I keep the bar low on my back with a medium grip on the bar but I can carry it lower when I move my grip out.
I wonder how far I should be leaning forward with the low bar position, do you guys have any advice? And should I go with the closer (little higher on my back but still low bar) or wider grip (pretty low on my back) ?