Table 2.
Characteristics of the potentiated resting twitch evoked by femoral nerve stimulation before (PRE) and at the end of the 2-min MVC
| Variable | PRE | POSTimm | POSTrelax | POST 1 | POST 2 | POST 4 | POST 8 |
|---|---|---|---|---|---|---|---|
| Potentiated peak twitch amplitude (N) | 144 ± 16 (115/182) | 40 ± 12‡ (17/67) | 50 ± 17‡ (23/88) | 84 ± 28‡ (44/139) | 111 ± 27‡ (63/161) | 120 ± 18‡ (94/143) | 116 ± 19‡ (86/144) |
| Time to peak amplitude (ms) | 88 ± 6 (79/99) | 88 ± 5 (79/94) | 92 ± 10 (79/94) | 92 ± 6 (80/102) | 90 ± 4 (79/97) | 86 ± 5 (75/94) | 81 ± 4 (72/87) |
| Half-relaxation time (ms) | 72 ± 12 (58/93) | 72 ± 13 (50/92) | 72 ± 15 (51/101) | 74 ± 13 (58/99) | 74 ± 13 (56/101) | 69 ± 11 (51/82) | 65 ± 10 (51/87) |
| Normalized peak rate of relaxation (s−1) | − 9.4 ± 1.4 (− 7.1/− 11.3) | − 10.5 ± 1.7 (− 8.2/− 13.6) | − 10.1 ± 1.5 (− 7.4/− 12.3) | − 8.9 ± 1.3 (− 6.8/− 10.4) | − 8.9 ± 1.4 (− 6.8/− 11.2) | − 9.4 ± 1.6 (− 7.7/− 12.4) | − 11.2 ± 1.3 (− 9.3/− 13.8) |
After the sustained contraction, a neuromuscular function evaluation was performed as an extension of the 2-min MVC (POSTimm) and additional evaluations were performed after 5 s of relaxation (POSTrelax) and 1 (POST 1), 2 (POST 2), 4 (POST 4), and 8 (POST 8) min after the end of the 2-min MVC. Values are means ± SD (min/max). For differences between time-points
‡P < 0.001