BACK ROW WITH TUBING
During pregnancy, there should be a focus on exercises like this, which strengthen posterior structures to help compensate for your growth out front.
How to: With resistance tubing at about waist height, stand tall with your knees slightly bent. Holding both handles with palms facing in, step back and extend your arms out in front of you. Inhale with your core breath and, as you exhale, pull the handles to your sides, bringing your elbows behind you; squeeze your shoulder blades. Inhale and return to starting position.
TIP Wrap tubing around a bannister, or exercise with a friend and take turns holding it while you encourage each other!