| ROS | Reactive Oxygen Species |
| SIRT1 | Sirtuin 1 |
| SRT2104 | SIRT1 activator |
| CON | Control |
| HU | Hindlimb Unloading |
| Nox2 | NADPH oxidase-2 |
| H2O2 | hydrogen peroxide |
| PGC-1α | peroxisome proliferator-activated receptor γ coactivator-1α |
| CS | Citrate synthase |
| CCO | cytochrome c oxidase |
| FCR | flux control ratio |
| PCI | oxidative phosphorylation supported by complex I |
| PCI+II | maximal coupled oxidative phosphorylation |
| ECI+II | maximal noncoupled electron transfer |
| ECII | electron transfer supported by complex II only |
| SOD | Superoxide dismutase |
| GPx | glutathione peroxidase |
| ATP | adenosine triphosphate |
| MIM | mitochondrial isolation medium |