Your Personal PT, Rachel Tavel, is a Doctor of Physical Therapy (DPT) and Certified Strength and Conditioning Specialist (CSCS), so she knows how to get your body back on track when it's out of line.
Do you sling your bag over just one shoulder? It is a common habit. Some people do it for style, the convenience of quickly taking it off, or because two straps digging into the shoulder appear to be ...