Table 3.
Interspike intervals and coefficients of variation of motor units in left biceps brachii averaged before, during, and after NMES protocols at three currents and two pulse widths to the right elbow flexors
| 80% Motor Threshold |
10% MVC Force |
20% MVC Force |
||||
|---|---|---|---|---|---|---|
| 0.2 Ms | 1 Ms | 0.2 Ms | 1 Ms | 0.2 Ms | 1 Ms | |
| Low thresholda | ||||||
| Mean ISI | 99.7 ± 19.0 | 93.0 ± 17.1 | 95.1 ± 19.4 | 91.8 ± 15.4 | 92.8 ± 18.8 | 95.1 ± 19.4 |
| CV ISI | 16.6 ± 8.7 | 17.1 ± 7.6 | 18.1 ± 10.0 | 16.6 ± 8.0 | 17.7 ± 8.6 | 18.8 ± 10.0 |
| High thresholdb | ||||||
| Mean ISI | 80.8 ± 16.0 | 77.6 ± 13.2 | 79.9 ± 18.0 | 81.0 ± 22.1 | 82.1 ± 15.6 | 76.1 ± 14.4 |
| CV ISI | 22.8 ± 11.2 | 23.9 ± 12.6 | 24.3 ± 12.1 | 23.4 ± 10.0 | 26.3 ± 13.2 | 22.1 ± 10.1 |
Values are means ± SD.
a
n = 28,
b
n = 16.
ISI, interspike interval; CV, coefficient of variation.