Figure 2. Relative changes in contractile properties of VL muscle prior and after each exercise. TTW-twitch torque, HRT-twitch half relaxation time, CT-twitch contraction time, TMVC-maximal voluntary torque; asterisks denote significant differences compared to the value before the fatiguing exercise; SSC-stretch-shortening cycle exercise; CON-concentric exercise; bar asterisks denote significant differences compared to the value before each exercise (* p < 0.05; ** p < 0.01; *** p < 0.001); asterisks on the x-axis denote the significance of time and exercise main effects; all the data are given as means with their standard deviations.