Meeting Banner
Abstract #2395

31P-MR Investigations of Training Effects on Resting State Concentration of Phosphor Metabolites in the M. Gastrocnemius

Reinhard Rzanny1, Norbert Stutzig2, Alexander Gussew1, Werner Alois Kaiser, Hans-Alexander Thorhauer2, Jrgen R. Reichenbach1

1Medical Physics Group, Institute of Diagnostic and Interventional Radiology, University Clinics Jena, Jena, Germany; 2Institute of Sports Science, Friedrich-Schiller-University Jena, Jena, Germany

A group of six professional volleyball players was investigated by 31P-MRS at 3.0 T before and after a complex training procedure. The estimated PCr/ATP ratios of the medial and lateral head M. gastrocnemius were used to compare trainings effects of a plyometric training and a modified plyometric training including additional applications of EMS pulses. The results indicate lower reduced PCr/ATP ratios for the medial head muscle after the modified plyometric training.This was interpreted as a reduction of the fiber shift from type II to type I by the aditional application of EMS in the training.