Do more front squats with weights that allow you to maintain a perfect position - build up a lot of volume there.
Make sure you have good thoracic spine mobility - if you can't extend the upper back adequately, it will be much harder to maintain the correct posture.
Good mornings focusing on upper back extension, back extensions, bent rows w focus on upper back extension.
Also make sure you have adequate ankle and hip flexibility - if you have long femurs and poor flexibility, your hips will be tor far back, and the torque on your upper back will increase, making it even harder to maintain proper extension.
|