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The stimulation frequency and pulse duration (PD) of the first (average ± SD) and last trains for each of the three fatigue protocols
| Frequency (Hz) | PD (μs) | |
|---|---|---|
| Frequency-modulation | ||
| First train | 11.6 ± 1.5 | 600 |
| Last train | 60.0 | 600 |
| PD-modulation | ||
| First train | 60.0 | 131 ± 23 |
| Last train | 60.0 | 600 |
| No-modulation | ||
| First train | 11.3 ± 1.6 | 600 |
| Last train | 11.3 ± 1.6 | 600 |
