Originally Posted by alcahuetej
Do you do these with a flat back at the bottom or rounded to work the lower back isometrically vs. dynamically?
I actually round the lumbar area just a bit to hit the erectors. When i go down i let the low back round a bit and go straighter as I near the top then hold it for a sec if that makes sense. My erectors are def holding size built from GMs and other stuff just fine with thes3