| AKE | Active Knee Extension |
| BMI | Body Mass Index |
| EMG | Electromyography |
| MVIC | Maximal Voluntary Isometric Contraction |
| RMS | Root Mean Square |
| sEMG | Surface Electromyography |
| SENIAM | Surface Electromyography for the Non-Invasive Assessment of Muscles |
| %MVIC | Percentage of Maximal Voluntary Isometric Contraction |