He is doing exercises to strengthen his shoulder blades.

The rhomboid major muscle is a part of the back muscles and plays a role in moving the scapula.

He exercises his rhomboid muscles at the gym every day.

He was carrying a large load on his back.

He is working out his muscles at the gym every day.

He struggled to move the heavy box.

Part of this movie is based on actual events.

His role is the team leader.

He drew a rhombus on the blackboard.

He drew a rhombus on the blackboard.