PT - JOURNAL ARTICLE AU - Andrea Ermolao AU - Michela Brogi AU - Veronica Baioccato AU - Sara Rovai TI - Unsafe workout: a weak and painful shoulder in a professional volleyball player AID - 10.1136/bcr-2018-228084 DP - 2019 May 01 TA - BMJ Case Reports PG - e228084 VI - 12 IP - 5 4099 - http://casereports.bmj.com/content/12/5/e228084.short 4100 - http://casereports.bmj.com/content/12/5/e228084.full SO - BMJ Case Reports2019 May 01; 12 AB - A 29-year-old professional volleyball player started complaining of a dull ache in the right lateral base of the neck. This pain arose during a preseasonal athletic training intense session. After 3 days, he presented deficiency of right scapula adduction, limitation of scapula elevation, right shoulder weakness and local mild pain. He had asymmetrical neckline with drooping of the affected shoulder, lateral displacement and minimal winging of the right scapula. After 1 week, hypothrophy of superior trapezius appeared. An electromyography of right upper limb showed a denervation in the upper, middle and lower components of the right trapezius muscle, due to axonotmesis of spinal accessory nerve (SAN). A subsequent MRI was consistent with muscular suffering caused by early denervation. This case shows idiopathic SAN palsy, likely secondary to an inappropriate use of a weight-lifting machine, where the athlete recovered after an adequate rest and rehabilitation period.