Table 2.
Maximal nEMG (% of max) and angle at maximal nEMG obtained during the concentric and eccentric phase of knee extensions performed with machine and elastic resistance.
| Muscle | nEMG(%of max) | Angle at peak EMG (°) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Elastic | Machine | Elastic | Machine | ||||||||
| Mean | SE | Mean | SE | P | Mean | SE | Mean | SE | P | ||
| Rectus femoris | CONCENTRIC | 76.7 | 4.6 | 83.9 | 4.6 | .24 | 38.9 | 4.3 | 55.0 | 4.3 | <.01 |
| ECCENTRIC | 45.1 | 3.6 | 60.7 | 3.5 | <.01 | 15.5 | 4.9 | 52.4 | 4.9 | <.01 | |
| Vastus lateralis | CONCENTRIC | 83.7 | 4.6 | 84.7 | 4.6 | .87 | 33.8 | 4.3 | 60.2 | 4.3 | <.01 |
| ECCENTRIC | 53.1 | 3.6 | 61.6 | 3.5 | .08 | 12.7 | 4.9 | 60.5 | 4.9 | <.01 | |
| Vastus medialis | CONCENTRIC | 71.5 | 4.6 | 81.8 | 4.6 | .10 | 34.3 | 4.3 | 64.3 | 4.3 | <.01 |
| ECCENTRIC | 43.2 | 3.6 | 57.3 | 3.5 | <.01 | 15.6 | 4.9 | 59.6 | 4.9 | <.01 | |
| Adductors | CONCENTRIC | 17.2 | 4.5 | 20.2 | 4.6 | .61 | 31.0 | 4.3 | 58.3 | 4.3 | <.01 |
| ECCENTRIC | 11.4 | 3.4 | 15.2 | 3.5 | .43 | 18.1 | 4.8 | 49.9 | 4.9 | <.01 | |
| Gluteus medius | CONCENTRIC | 13.2 | 4.5 | 13.2 | 4.6 | .99 | 30.0 | 4.3 | 42.9 | 4.3 | <.01 |
| ECCENTRIC | 8.5 | 3.4 | 8.4 | 3.5 | .98 | 12.4 | 4.8 | 24.6 | 4.9 | .04 | |
| Erector spinae | CONCENTRIC | 13.3 | 4.5 | 21.2 | 4.6 | .19 | 31.9 | 4.3 | 62.4 | 4.3 | <.01 |
| ECCENTRIC | 12.0 | 3.4 | 17.2 | 3.5 | .28 | 39.7 | 4.8 | 48.8 | 4.9 | .12 | |
| Obliques externus | CONCENTRIC | 13.2 | 4.5 | 20.0 | 4.6 | .26 | 29.4 | 4.3 | 46.8 | 4.3 | <.01 |
| ECCENTRIC | 9.3 | 3.4 | 12.8 | 3.5 | .46 | 20.6 | 4.8 | 36.9 | 4.9 | <.01 | |
| Rectus abdominis | CONCENTRIC | 7.0 | 4.5 | 11.3 | 4.6 | .47 | 27.2 | 4.3 | 48.1 | 4.3 | <.01 |
| ECCENTRIC | 4.6 | 3.4 | 6.2 | 3.5 | .74 | 23.6 | 4.8 | 40.7 | 4.9 | <.01 | |
| Biceps femoris | CONCENTRIC | 13.6 | 4.5 | 17.3 | 4.6 | .53 | 43.2 | 4.3 | 68.5 | 4.3 | <.01 |
| ECCENTRIC | 8.6 | 3.4 | 13.2 | 3.5 | .34 | 24.8 | 4.8 | 64.8 | 4.9 | <.01 | |
| Semi tendinosus | CONCENTRIC | 7.9 | 4.5 | 7.3 | 4.6 | .93 | 36.1 | 4.3 | 67.0 | 4.3 | <.01 |
| ECCENTRIC | 5.3 | 3.4 | 5.4 | 3.5 | .97 | 16.4 | 4.8 | 62.8 | 4.9 | <.01 | |
Data presented as mean and SE (of the least square means and p‐values denotes differences between the elastic and machine exercise.