Question
Just fyi when I said arching my back in the wrong direction I just mean bending it in the wrong direction, not arching it back and sticking the chest out like they tell you to do in instructional safety videos

Answer
Hello Jeff,

    Posture is important!! Not as much when sitting. But when lifting weights your technique and posture is extremely important.  People with unbalanced (does not mean weak backs) will often rupture a lower lumbar disc, I especially see this with dead lifters.  However, proper lifting techniques strenthen the back and decrease spinal pain and risk of injury.  You may want to have a personal trainer watch you for a couple of weeks to ensure you are performing excellant biomechanical explosive techniques.

Have a great day,
Dr. Brendon O'Brien D.C.