| http://www.w3.org/ns/prov#value | - This type of SIS, called ???posterior SIS,??? affects mostly baseball pitchers, but can also affect people who play American football, tennis, and other sports that involve a lot of overhead movements.SHOULDER IMPINGEMENT SYNDROME SYMPTOMSThe main shoulder impingement syndrome (SIS) symptom is pain that occurs when the person lifts his or her arms overhead or reaches backwards.
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