nearly significantp = 0.057
In our patients, central fatigue worsen during motor contraction; FSS score was significantly correlated to maximal voluntary contraction (before and after the effort, r-before = -0.583, p <0.01, r-after= -0.534, p < 0.05), and to motor disability measured by MRC (r = -0.496, p < 0.05); also, the association to lactate baseline reached a nearly significant value (r = 0.378, p = 0.057).