| 2DGE | Two-dimensional gel electrophoresis |
| LC-MS | liquid chromatography mass spectrometry |
| MLRS | Myosin Light Regulatory Chain, fast isoform |
| MRM | Multiple Reaction Monitoring |
| MyHC | Myosin Heavy Chain |
| MYL1 | Myosin Light Chain 1 |
| MYL3 | Myosin Light Chain 3 |
| MU | Motor unit |
| OT | Old Trained |
| OU | Old Untrained |
| SRM | Selective Reaction Monitoring |
| YT | Young Trained |
| YU | Young Untrained |