| 1RM | One-repetition maximum |
| BM | Body mass |
| BMI | Body mass index |
| BW | Bone weight |
| CSSQ | Cross-sectional section of the quadriceps |
| DAM | Median absolute deviation |
| Dif1 | Anterior fat EI minus RF EI |
| Dif2 | Anterior fat EI minus anterior VI EI |
| Dif3 | Anterior fat EI minus the average of RF EI + anterior VI EI |
| Dif4 | Lateral fat EI minus VL EI |
| Dif5 | Anterior fat EI minus lateral VI EI |
| Dif6 | Lateral fat EI minus the average of VL EI + lateral VI EI |
| Ecto | Ectomorphy |
| EI | Echo-intensity |
| EIRF | EI of the RF |
| EISFTAR | EI of subcutaneous fat tissue in the anterior region |
| EISFTLR | EI of subcutaneous fat tissue in the lateral region |
| EIVIAR | EI of the VI in the anterior region |
| EIVILR | EI of the VI in the lateral region |
| EIVL | EI of the VL |
| Endo | Endomorphy |
| FTLT | Fat thickness in the lateral region |
| FW | Fat weight |
| M | Mean |
| Meso | Mesomorphy |
| MRI | Magnetic resonance imaging |
| MW | Muscle weight |
| n | Sample size |
| PARF | Pennation angle of the RF |
| PAVL | Pennation angle of the VL |
| RW | Residual weight |
| SD | Standard deviation |
| SFTTAR | Subcutaneous fat tissue thickness in the anterior region |
| T | Tomography |
| TAT | Total anterior thickness |
| TLT | Total lateral thickness |
| TRF | Thickness of the RF |
| TVIAR | Thickness of the VI in the anterior region |
| TVILR | Thickness of the VI in the lateral region |
| TVL | Thickness of the VL |
| US | Ultrasound |
| WHO | World Health Organization |
| WHR | Waist-to-hip ratio |