In this 2018 retrospective study, Chou et al. evaluated the efficacy of extracorporeal shockwave therapy (ESWT) in treating shoulder tendinitis and partial-thickness rotator cuff tears (PTRCTs) among athletes and non-athletes. The study included 36 shoulders—13 from professional athletes (athletic group, AG) and 23 from non-athletes (non-athletic group, NAG)—all of whom