Table 1. Values of neuromuscular function parameters before and after fatigue according to the intensity of the fatiguing exercise.
Parameter | Intensity | Pre-fatigue | Post-fatigue | % change |
MVIT (N⋅m) | 25 | 113.3±21.8 | 79.0±23.7*** | −30.2† |
50 | 109.3±23.1 | 83.1±18.4*** | −24.0‡ | |
75 | 110.8±20.7 | 97.8±18.6*** | −11.7 | |
Doublet peak torque (N⋅m) | 25 | 34.8±8.6 | 31.6±7.6*** | −9.4 |
50 | 33.3±9.0 | 31.5±7.8*** | −5.6 | |
75 | 34.7±8.5 | 34.2±9.0 | −1.5† | |
Doublet contraction time (s) | 25 | 0.125±0.008 | 0.122±0.012 | −1.9† |
50 | 0.126±0.012 | 0.153±0.029*** | +21.5 | |
75 | 0.125±0.008 | 0.151±0.023*** | +20.6 | |
Doublet half-relaxation time (s) | 25 | 0.089±0.012 | 0.120±0.027*** | +35.6† |
50 | 0.088±0.013 | 0.189±0.040*** | +114.9‡ | |
75 | 0.095±0.033 | 0.162±0.053*** | +70.1 | |
Voluntary activation (%) | 25 | 94.4±9.0 | 84.0±14.3*** | −11.1† |
50 | 95.3±7.5 | 92.1±9.9 | −3.4 | |
75 | 93.9±8.6 | 93.9±8.2 | +0.1 |
Values are means ± SD. MVIT: maximal voluntary isometric torque.
significantly different from pre-fatigue values (p<0.001).
% change significantly different from the two other intensities (p<0.05).
% change significantly different from 75% (p<0.05).