Fig. 2.

a Pooled effect of the fatiguing stimulation on the peak-to-peak torque amplitude (PT) values during SES (black line) and SDSS (red line). Mean values for five consecutive trains at eight points during the fatiguing stimulation are depicted. b Fatigue index (FI), and c torque–time integral (TTI) during SES and SDSS. *Significant differences between the initial values and those during the test; ^†significant differences between the values during SES and SDSS (color figure online)