According to its anatomy, the shoulder is located in the area of the upper extremities and represents the root joint of the hand. Its functional role is that as part of the shoulder girdle it allows a man to move his arm. The acromioclavicular joint is located at the very top of the shoulder girdle. Injuries occur under the influence of a direct external force directed at the acromioclavicular joint. These types of injuries are most common in falls or strong blows, when falling from a bicycle or in sports that are quite aggressive, such as rugby, hockey, judo, skiing, cycling and handball. Symptoms of acromiclavicular joint injury are severe pain, swelling and hematoma at the site of injury, ie at the top of the shoulder, and often the shoulder falls forward due to loss of support function of the acromioclavicular joint. The health and stability of the acromioclavicular joint is achieved by proper and regular or preventive and rehabilitative exercise of the muscles that surround the shoulder joint. It is the muscles of the shoulder joint that are the active stabilizers of the shoulder and are therefore given the most attention. Shoulder injuries can be quite serious, and if not healed in time can result in later complications and problems. Therefore, the shoulder girdle muscles need to be constantly maintained in order to be at a level that is optimal for performing daily tasks. Frequent injuries of the acriomiclavicular joint and the challenge of diagnos and later accurate determination of strength in the load program for optimal duration and the outcome of rehabilitation are the problem of this paper. The biggest drawback is that there is no consensus in the literature on the ideal test protocol to determine the ideal load progression after an acromioclavicular joint injury. The point of this paper is to gain insight into acromioclavicular joint injuries, to describe the protocol of acromioclavicular joint rehabilitation with emphasis on the application of specific tests in determining the progression after injury.