Table 3.
Results of different NMES currents and phase durations for each stimulation intensity.
| Outcome | PC 500 | PC 200 | KFAC 500 | KFAC 200 | |
|---|---|---|---|---|---|
| Absolute torque (Nm) | 20% | 7.1 (3.7, 10.6) | 3.4 (2.3, 4.6) | 6.1 (2.3, 10) | 3.9 (2.6, 5.3) |
| 40% | 48.1 (33.7, 62.3) | 13.8 (6.5, 21.2) | 45.9 (27.2, 64.6) | 19.2 (9.1, 29.3) | |
| 60% | 105.5 (84.1, 126.9) | 48.8 (32.8, 64.9) | 100.1 (76.6, 123.6) | 63.9 (46.5, 81.2) | |
| 80% | 149.1 (129.1, 169.1) | 84.4 (64.8, 104.1) | 146.8 (120.1, 172.7) | 111.8 (90.6, 133.0) | |
| 100% | 170.7 (153.1, 188.3) | 122.1 (101.9, 142.3) | 172.3 (147.9, 96.6) | 144.1 (125.1, 163.2) | |
| Evoked torque (Nm) | 20% | 3.1 (1.5, 4.5) | 1.2 (0.8, 1.6) | 2.9 (1.1, 4.8) | 1.5 (0.8, 2.1) |
| 40% | 18.7 (13.1, 24.3) | 5.9 (2.5, 9.4) | 23.9 (15.1, 32.7) | 7.8 (3.4, 12.1) | |
| 60% | 42.1 (32.5, 51.5) | 22.1 (14.1, 30.1) | 47.6 (36.5, 58.6) | 27.4 (19.5, 35.3) | |
| 80% | 58.3 (47.6, 68.9) | 36.4 (26.3, 46.5) | 64.9 (52.1, 77.7) | 45.6 (34.9, 56.2) | |
| 100% | 70.5 (62, 79.) | 55.6 (43.9, 67.2) | 72. (59.9, 84.1) | 64.5 (51.7, 77.4) | |
| Discomfort (0, 10) | 20% | 1.6 (1, 2.2) | 0.7 (0.5, 1.) | 1.1 (0.8, 1.3) | 0.8 (0.6, 1.) |
| 40% | 3.1 (2.5, 3.6) | 2.3 (1.8, 2.8) | 2.9 (2.5, 3.4) | 2.3 (1.9, 2.7) | |
| 60% | 5.3 (4.7, 5.8) | 4.6 (4.0, 5.2) | 5.2 (4.7, 5.7) | 4.8 (4.3, 5.3) | |
| 80% | 7.8 (7.4, 8.2) | 6.8 (6.1, 7.5) | 7.8 (7.2, 8.3) | 7.3 (6.9, 7.7) | |
| 100% | 9.7 (9.5, 10) | 9. (8.3, 9.6) | 9.2 (8.6, 9.7) | 9.3 (8.8, 9.7) | |
| NMES efficiency (Nm/mA) | 20% | 14.8 (5.3, 24.3) | 6.2 (4.1, 8.3) | 13.3 (7.9, 22.6) | 13.3 (6.9, 19.7) |
| 40% | 59.8 (27.8, 91.7) | 14.9 (6.3, 23.5) | 46.9 (33.2, 60.6) | 7.5 (4.4, 10.7) | |
| 60% | 79.3 (60.9, 97.8) | 36.8 (23.4, 50.2) | 70.1 (54.5, 85.5) | 19.5 (8.6, 30.4) | |
| 80% | 81.1 (65.1, 97.1) | 45.5 (32.9, 58.1) | 72.8 (59.8, 85.9) | 45.7 (32.5, 58.9) | |
| 100% | 72 (59.9, 84.1) | 55.6 (43.9, 67.2) | 70.5 (62.2, 78.8) | 64.5 (51.7, 77.4) |
Data are reported as mean (95% CI).
KFAC, kHz frequency alternating currents; NMES, neuromuscular electrical stimulation; MVC, maximal voluntary contraction; PC, pulsed current.
The P value for the factor “Phase Duration” is <.01 for all variables.
The P value for the factor “Current Type” is >.05 for all variables.
The P value for the factor “Current Intensity” is <.01 for all variables.