Bars in (A), (C) and (E) show the mean values for mass‐specific PCI, PCI&CII and E respectively, whereas the bars in (B), (D) and (F) show the mean values for mitochondria‐specific PCI, PCI&CII and E, respectively. Individual subjects are shown as grey lines. Symbols indicate a significant effect of group (#), a significant difference from the within‐group, pre‐training mean (§) and a significant difference between groups at the post‐training mean (†). Error bars represent the SEM (n = 8 subjects).