Get into a high plank position — hands under shoulders, legs straight, core tight, and body in a straight line. Keep your arms straight, elbows locked, and hips steady. Don’t bend your elbows during the movement. Squeeze your shoulder blades together to lower your chest slightly — like you’re trying to pinch a pencil between them. Press through your hands to spread your shoulder blades apart and return to the starting position. Move slowly and with control through each rep, focusing on scapular movement, not bending at the elbows.