The rhomboid muscles are a pair of muscles located in the upper back, between the spine and the shoulder blades. They consist of two main parts: the rhomboid major and the rhomboid minor. These muscles play a crucial role in retracting the scapulae, which means they help pull the shoulder blades together and stabilize them during arm movements. Rhomboid muscles are essential for maintaining good posture and supporting various upper body activities, such as lifting and pulling. Strengthening these muscles can improve overall back strength and reduce the risk of injuries, especially for athletes and individuals who engage in physical activities.