Figure 4

Increased mitochondrial enzyme activities in muscles of myositis patients after 12 weeks of endurance training. Individual data from three patients obtained before and after 12 weeks of endurance training for cycling time at the same absolute work load for each subject (A) and the activity of two mitochondrial enzymes, CS (B) and β-HAD (C), in muscle biopsies from vastus lateralis muscle. D-F. Mean data of the difference after vs. before training (n = 3); data for five patients in the control group (no training) are also shown.