Hi,
So this is us the third time i have to stop doing Jefferson Curls due to a lower back pain. Every time i will slowly resume adding weight very little by little and focus on developing more hamstring flexibility to reduce stress I the back pain when doing JC. I don't know how to work this around as this is the third time already since i started. I already had a form check on the private video reviewe and MNPE1 and im were approved.... Any help? I add my JC form if it's out of any help