Figure 2. A. Creatine kinase (CK) efflux from soleus muscle in the control experiment without any muscle manipulation (control), after 100 passive stretches (PS), after isometric exercise (IE) and eccentric exercise (EE) consisting of 100 contractions each, respectively. B. Peak isometric force during isometric exercise (IE) and eccentric exercise (EE). Data are shown as means and SD. * p < 0.05 EE compared to control; ** p < 0.01 EE compared to IE; *** p < 0.001 EE compared to IE.