Figure 4. Time-dependent phosphocreatine (PCr) content and pH changes throughout post-exercise recovery periods. Profiles A and B were recorded after aerobic exercise, whereas profiles C and D represent recovery periods after ischemic exercise. Results are presented as means +/- SE. [circle, open]----[circle, open] corresponds to MHN group and [round bullet, filled]----[round bullet, filled] to malignant hyperthermia susceptible (MHS) group. The asterisk indicates a significant difference between malignant hyperthermia-negative and MHS groups (P < 0.05). The first point corresponds to the end of exercise value.