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Article History

Received: 16 September 2021

Accepted: 23 November 2021

First Online: 7 December 2021

Declarations

:

: This study was performed according to the Declaration of Helsinki. The study was approved by the local ethics board of Friedrich-Alexander University Erlangen-Nuremberg (Erlangen, Germany) (registration number 387_17 Bc). All players whose data were analyzed in this study have explicitly granted permission, including publication of the data.

: All players whose individual healing process and course of treatment are shown in Figs.  and as well as the player whose individual MRI scans are shown in Fig.  have explicitly granted permission to publish these data and images.

: CS has received research funding from Electro Medical Systems (Nyon, Switzerland) (the inventor, manufacturer and distributor of the Swiss DolorClast rESWT device as well as the distributor of the Swiss PiezoClast fESWT device) for his preclinical research at LMU Munich (unrestricted grant) and consulted (until December 31, 2017) for Electro Medical Systems. Furthermore, Electro Medical Systems provided the rESWT and fESWT devices used in this study. However, Electro Medical Systems had no role in study design, data collection and analysis, interpretation of the data, and no role in the decision to publish and write this manuscript. No other potential competing interest relevant to this article were reported.