Sitting better

Instead of focusing on the chest or shoulders, Sherer says, we need to turn our attention to a body part that is lower down, below the waist: the pelvis.
Or to put another way — your butt.
“The most important thing to change to reduce back pain is your pelvis position,” she says. “It’s like a stack of toy blocks. If the blocks at the bottom aren’t sturdy, then the top has no chance.”