Table 5. Root mean square (RMSD), absolute difference (ABSD), and percentage difference (%D) between the amplitude of knee extensors EMGs normalized using the isometric MVC method and MDM, PDM, *PDM, and **PDM methods.
| Knee Extensors | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| RF | VL | VM | ||||||||
| RMSD | ABSD | %D | RMSD | ABSD | %D | RMSD | ABSD | %D | ||
| MVC: MDM | Mean | 0.97 | 0.81 | 2142.97 | 2.76 | 1.94 | 1826.84 | 1.43 | 1.05 | 2421.68 |
| SD | 0.29 | 0.25 | 1885.32 | 3.77 | 2.64 | 2184.82 | 0.37 | 0.18 | 2655.96 | |
| MVC: PDM | Mean | 0.26 | 0.21 | 585.63 | 1.90 | 1.35 | 260.08 | 0.14 | 0.10 | 241.95 |
| SD | 0.25 | 0.21 | 770.35 | 4.52 | 3.17 | 340.95 | 0.07 | 0.05 | 314.31 | |
| MVC: *PDM | Mean | 0.12 | 0.10 | 103.64 | 1.86 | 1.32 | 83.39 | 0.08 | 0.07 | 67.22 |
| SD | 0.17 | 0.14 | 61.40 | 4.60 | 3.23 | 86.81 | 0.09 | 0.07 | 67.19 | |
| MVC: **PDM | Mean | 0.10 | 0.09 | 45.03 | 1.87 | 1.33 | 84.33 | 0.09 | 0.07 | 51.21 |
| SD | 0.18 | 0.15 | 35.59 | 4.60 | 3.23 | 88.32 | 0.09 | 0.08 | 40.76 | |
RF, Rectus Femoris; VL, Vastus Lateralis; VM, Vastus Medialis
*PDM refers to the method of normalization by using the peak values through ADLs
**PDM refers to the method of normalization by using the peak values through ADLs and MVC.