Arched back GM's build static strength in the erectors which helps keep the back arched for squatting. Bentover (rounded) GM's build the erectors, hammies, and glutes because it's extending your back in addition to the hammies. I'll probably do an arched GM next time because that's what I need to work on. The 405 started rounding my back a bit coming up the other day, so I stopped there even though I think I could've done more.
I have to wait another week (next week) before I can rotate my work around so I can get in the OCSC for my maximal effort squats Tuesday. So that sucks. The good news is tomorrow I'm going to hopefully put some time under the football bar for my max effort. My triceps want some serious work.. They whispered it in my ear.
