Claims of<unk> s by industry Epidemiological studies strongly support a relationship between age and<unk> <unk>  prevalence. Those most prone to failed<unk> <unk>  syndrome are people 65 years of age or older; and those with large, sustained<unk> s. Smokers, diabetes sufferers, individuals with muscle atrophy and/or fatty infiltration, and those who do not follow postoperative-care recommendations also are at greater risk. In a recent study the frequency of such<unk> s increased from 13% in the youngest group (aged 50–59 y) to 20% (aged 60–69 y), 31% (aged 70–79 y), and 51% in the oldest group (aged 80–89 y). This high rate of<unk>  prevalence in asymptomatic individuals suggests that<unk> s could be considered a "normal" process of aging rather than a result of an apparent pathological process. They are known to increase in frequency with age and the most common cause is age-related degeneration and, less frequently, sports injuries or trauma. Some risk factors such as increased age and height cannot be changed. Increased body mass index is also associated with<unk> ing. Recurrent lifting and overhead motions are at risk for<unk> <unk>  injury as well. This includes jobs that involve repetitive overhead work, such as carpenters, painters, custodians, and servers. People who play sports that involve overhead motions, such as swimming, water polo, volleyball, baseball, tennis, and American football quarterbacks, are at a greater risk of experiencing a<unk> . Striking-based combat sports, such as boxing, also account for severe<unk> <unk>  injuries of competitors, typically when their punches miss the target, or overusing the shoulder by throwing excessively large amounts of punches. Certain track-and-field activities, such as shot put, javelin throw are also of considerable risk, especially when performing outdoors under cold weather conditions or neglecting warming-up procedures, for proper warm-up of the throwing and/or swinging arm can help reduce the stress on the musculature of the shoulder girdle. Generally, the rates of<unk> <unk>  injuries increases with age while corticosteroid injections around the tendons increases the risk of tendon<unk>  and delay tendon healing.
Rotator cuff tear
Shoulder impingement syndrome
Biceps tendon rupture
Shoulder problem
Iliotibial band syndrome
Subacromial bursitis
Retrocalcaneal bursitis
Thoracic outlet syndrome