Table 1.
Preexercise muscle properties
Single stimulus |
Voluntary |
Tetanus |
||||||||
---|---|---|---|---|---|---|---|---|---|---|
CMAP (mV) | TT (N) | CNT (ms) | RT1/2 (ms) | MVC (N) | Added force (%) | TF (N) | RT1/2 (ms) | Rising rate (normalized, % TF/s) | TF/TT | |
Patients(N = 28) | 5.4 ± 0.2 | 11.1 ± 1.2 | 84.1 ± 2.7 | 104.0 ± 5.0 | 223.1 ± 17.0 | 19.2 ± 8.5 | 124.7 ± 7.6 | 234.2 ± 18.7 | 846 ± 50 | 14.0 ± 1.7 |
Controls (N = 14) | 6.5 ± 0.3 | 15.0 ± 1.9 | 88.4 ± 1.8 | 107.1 ± 5.8 | 357.9 ± 19.7 | 0.5 | 206.1 ± 17.3 | 165.8 ± 5.1 | 10175 ± 44 | 13.8 ± 1 |
P values | <0.01 | <0.05 | 0.13 | 0.3 | <0.01 | <O.05 | <0.01 | <0.01 | <0.05 | 0.5 |
CMAP = compound muscle action potential; TT = twitch tension; CNT = twitch contraction time; RT1/2 = half-relaxation time; MVC = maximum voluntary contraction; TF = tetanic force.