Dr. Lizzie Kieffer: Pregnancy, Postpartum, Pelvic Floor Workouts on Instagram: "Posture starts with strength. And of course mobility. The combo of these two is what ultimately helps that tight upper back and neck tension you’re feeling! Posture devices are just a Band-Aid fix…if you want lasting results, you need to address it at the root, which is more movement! And it doesn’t have to be complicated. This quick little workout is a great shoulder strength routine paired with mobility that you ca