Fig. 1

Exposure of human skeletal muscle cells to radial extracorporeal shock waves in vitro. a Positioning of the handpiece of a radial extracorporeal shock wave (rESW) device (Swiss DolorClast; Electro Medical Systems, Nyon, Switzerland) in a fixed position using a customized holder. b Exposure of cells cultivated at the bottom of 6-well plates to rESWs at a constant distance of 13 mm. The arrows point to the applicator of the handpiece that is emitting the rESWs