he main objective of the current study was to assess the analgesic effect achieved to short- and medium-term by the use of acupuncture on individuals with impingement syndrome of the shoulder, in comparison to the use of acupuncture at sham points. Furthermore, secondary objectives were also sought, such as the short- to medium-term functional recovery of the affected joint, knowing the possible influence that this has over the recovery of the laterality of the subject, as well as the development of a protocol to select points to treat pain affecting the shoulder area.