Table 1.
Contraction time and muscle displacement time course descriptive values at different time course points.
| Intensity | 20 mA | 40 mA | 60 mA | 80 mA | 100 mA | Dm-Max mA | Amplitude Effect | |
|---|---|---|---|---|---|---|---|---|
| p-Value | η2p | |||||||
| Contraction Time (ms) | ||||||||
| Biceps Femoris | ||||||||
| Pre | 29.1 ± 13.6 ef |
31.6 ± 10.3 | 33.1 ± 11.7 | 36.5 ± 11.9 | 40.1 ± 13.6 a |
40.5 ± 13.5 a |
<0.001 | 0.16 |
| Post | 37.08 ± 12.8 f |
31.3 ± 14.8 f |
35.4 ± 12.2 f |
37.0 ± 12.6 f |
41.7± 14.2 | 44.1 ± 13.5 abcd |
<0.001 | 0.14 |
| +24 h | 38.3 ± 15.5 | 30.2 ± 15.6 | 34.3 ± 12.0 f |
35.7 ± 15.0 | 40.2 ± 16.2 | 43.3 ± 16.7 c |
0.003 | 0.12 |
| +48 h | 35.9 ± 13.6 | 31.5 ± 16.2 | 33.0 ± 11.9 | 34.2 ± 13.2 | 37.1 ± 16.2 | 39.6 ± 16.3 | 0.119 | 0.05 |
| Rectus Femoris | ||||||||
| Pre | 34.1 ± 9.6 * |
29.5 ± 6.2 adef |
27.7 ± 5.8 a |
27.0 ± 4.3 abf |
26.3 ± 4.3 abd |
27.3 ± 5.1 ab |
<0.001 | 0.35 |
| Post | 36.1 ± 13.5 ef |
34.6 ± 8.5 def |
31.9 ± 5.7 de |
28.2 ± 6.4 bdf |
27.6 ± 3.9 abc |
26.9 ± 3.8 abc |
<0.001 | 0.23 |
| +24 h | 35.6 ± 14.3 | 34.5 ± 9.5 def |
30.8 ± 6.3 ef |
29.1 ± 5.1 bef |
28.1 ± 4.5 bcdf |
27.4 ± 4.4 bcde |
0.002 | 0.18 |
| +48 h | 32.1 ± 11.4 | 34.3 ± 9.8 def |
31.1 ± 7.0 def |
28.5 ± 6.0 bc |
27.6 ± 4.6 bc |
27.0 ± 4.2 bc |
0.006 | 0.14 |
| Muscle Displacement (mm) | ||||||||
| Biceps Femoris | ||||||||
| Pre | 1.2 ± 1.3 * | 3.7 ± 1.7 * |
5.2 ± 2.1 * |
6.7 ± 2.7 * |
8.1 ± 2.7 abcd |
8.1 ± 2.7 abcd |
<0.001 | 0.82 |
| Post | 7.5 ± 3.8 bc |
1.4 ± 1.4 * |
3.9 ± 1.5 * |
5.3 ± 2.0 bcef |
6.9 ± 2.7 bcdf |
8.1 ± 2.8 bcde |
<0.001 | 0.60 |
| +24 h | 7.1 ± 3.9 bcd |
1.3 ± 1.3 * |
3.2 ± 1.5 * |
4.4 ± 1.9 * |
5.7 ± 2.5 bcdf |
6.7 ± 2.9 bcde |
<0.001 | 0.52 |
| +48 h | 7.6 ± 4.2 bc |
1.6 ± 1.8 * |
4.1 ± 2.4 * |
5.3 ± 2.8 bcef |
6.4 ± 2.3 bcd |
7.0 ± 3.4 bcd |
0.001 | 0.49 |
| Rectus Femoris | ||||||||
| Pre | 3.3 ± 2.1 * | 7.4 ± 3.0 * |
8.6 ± 2.8 * |
9.2 ± 2.9 * |
9.7 ± 3.1 abcd |
10.1 ± 3.0 abcd |
<0.001 | 0.80 |
| Post | 7.9 ± 3.6 b |
4.3 ± 2.7 * |
7.9 ± 2.8 bdef |
8.7 ± 2.7 bcef |
9.1 ± 2.6 bcd |
9.5 ± 2.7 bcd |
<0.001 | 0.44 |
| +24 h | 7.5 ± 3.9 b |
4.0 ± 2.8 * |
7.7 ± 3.0 bdef |
8.6 ± 2.9 bcef |
9.1 ± 2.9 bcdf |
9.5 ± 3.0 bcde |
<0.001 | 0.43 |
| +48 h | 7.0 ± 3.9 b |
3.9 ± 2.7 * |
2.2 ± 3.0 * |
8.0 ± 2.9 bcef |
8.6 ± 2.9 bcd |
9.2 ± 2.9 bcd |
<0.001 | 0.42 |
* = significant (p < 0.05) differences with all NMES amplitudes. Letters show a significant (p < 0.05) difference with a specific NMES amplitude (a = 20 mA; b = 40 mA; c = 60 mA; d = 80 mA; e = 100 mA; f = Dm-Max (maximum muscle displacement NMES amplitude). η2p = partial eta-squared effect size.