Figure 7. Creatine kinase (CK) levels in the (A) EMS-Group (EG) and (B) Jump-Training-Group (TG) at baseline, wk 7 and wk 14. CK was measured in the blood serum before (pre) and 24h after (24h post) the training interventions. Values are presented in means ± SD, and significant differences at p<0.05 (*) and p<0.01 (**).