Table 2.
Dorsiflexion neuromuscular parameters at baseline
| Parameter | Controls | DPN Patients | Difference, % |
|---|---|---|---|
| Torque | |||
| MVC torque, N·m | 33.7 ± 8.1 | 20.2 ± 9.2* | −40 |
| MVC RTD, N·m·s−1 | 170.2 ± 41.5 | 89.1 ± 37.9* | −47 |
| Voluntary activation, % | 98.8 ± 2.1 | 97.2 ± 3.7 | |
| Baseline twitch torque, N·m | 5.1 ± 1.7 | 3.2 ± 1.8* | −36 |
| Baseline twitch torque/TPT, N·m·s−1 | 45.0 ± 17.0 | 28.0 ± 14.0* | −38 |
| Baseline twitch torque/HRT, N·m·s−1 | 41.0 ± 12.0 | 19.0 ± 14.0* | −54 |
| Potentiated twitch torque, N·m | 8.3 ± 2.9 | 4.4 ± 1.2* | −47 |
| Potentiated twitch torque/TPT, N·m·s−1 | 98.0 ± 24.0 | 58.0 ± 19.0* | −41 |
| Potentiated twitch torque/HRT, N·m·s−1 | 79.0 ± 15.0 | 32.0 ± 16.0* | −59 |
| EMG | |||
| CMAP NP amplitude, mV | 6.6 ± 0.7 | 4.6 ± 1.1* | −30 |
| CMAP NP duration, ms | 15.0 ± 1.0 | 15.0 ± 2.0 | |
| CMAP NP area, mVms | 43.0 ± 11.0 | 30.0 ± 13.0* | −30 |
Values are means ± SD. MVC, maximal voluntary contraction; RTD, rate of torque development; TPT, time to peak twitch; HRT, half-relaxation time; EMG, electromyography; CMAP, compound muscle action potential; NP, negative peak.
*
Significant difference between groups (P < 0.05).