The shoulder joint has way less stability than the hip joint due to minimal osseous support, meaning that the head of the humerus is kept in place through a complex of tendons, labrum, joint capsules, and ligaments. The clavicula is “floating,” and the scapula is only held in place through another set of muscles. Many cuff rotators injuries happen since the tonus of the shoulder stabilizing muscles can be lost through trauma, imbalanced use, or very commonly in vet staff, by poor posture. Although you can decompose this series in specific exercises at your own rhythm, you can indeed flow and benefit from a full continuous practice at home.