Greater trochanteric pain syndrome (GTPS) is inflammation of the trochanteric bursa, a sac of fluid protecting the prominent bony part of the hip. The bursa has the function of working as a shock absorber and as a spacer for the movement of the muscles adjacent to it (imagine it stops the muscles from wearing out on the bone).
Furia et al. (2009) compared outcomes of two groups of patients with chronic greater trochanteric pain syndrome. The study group received low-energy shockwave (SWT) and the control group received other therapies. The patients undergoing SWT improved significantly more than those in the other therapies (control) group. 76.5% of the patients in the SWT group who participated in regular sporting activities were able to return to their preferred sports. At final follow-up, the number of patients with excellent and good results were significantly higher after shockwave.