| MVIC | Maximal voluntary isometric contraction |
| RF | Rectus femoris |
| VM | Vastus medialis |
| VL | Vastus lateralis |
| VI | Vastus intermedius |
| Lf | fascicle length |
| Θp | pennation angle |
| TAC | Tendon aponeurosis complex |
| EMG | surface electromyography |
| CONSORT | Consolidated Standards of Reporting Trials |
| SUP60 | supine with 60° of knee flexion |
| SIT60 | seated with 60° of knee flexion |
| SUP20 | supine with 20° of knee flexion |
| SIT20 | seated with 20° of knee flexion |
| RMS | Root mean square |
| CI | Confidence interval 95% |
| ANOVA | Analysis of variance |
| ηρ2 | eta squared |
| ICC | Intra-class correlation |
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