Table S2. Correlation of confounding factors toward continuous data of variables. MO1 MO2 TSC Age Training duration HRV1 r -0.086 -0.091 0.153 -0.035 0.079 p 0.419 0.394 0.149 0.740 0.460 n 90 90 90 90 90 HRV2 r -0.086 -0.204 0.235 -0.080 -0.011 p 0.421 0.053 0.026 0.452 0.920 n 90 90 90 90 90 CSA1 r 0.324* 0.167 0.024 0.040 -0.022 p 0.002 0.115 0.823 0.706 0.837 n 90 90 90 90 90 CSA2 r 0.123 0.058 0.034 0.121 0.065 p 0.247 0.589 0.748 0.254 0.554 n 90 90 90 90 90 SC1 r -0.067 -0.027 -0.076 -0.096 -0.040 p 0.530 0.798 0.477 0.369 0.709 n 90 90 90 90 90 SC2 r 0.129 0.056 -0.141 -0.114 -0.006 p 0.224 0.598 0.185 0.283 0.952 n 90 90 90 90 90 MF0 r 0.250 0.127 -0.030 -0.083 -0.019 p 0.018 0.233 0.782 0.436 0.857 n 90 90 90 90 90 MF1 r 0.143 0.181 0.056 -0.008 -0.008 p 0.179 0.088 0.600 0.939 0.944 n 90 90 90 90 90 MF2 r 0.086 0.138 -0.033 0.013 0.022 p 0.421 0.195 0.761 0.906 0.839 n 90 90 90 90 90 *The value is considered to be moderate correlation 1: pre-test; 2: post-test; HRV: heart rate variable; CSA: cognitive and somatic anxiety; SC: state confidence; MF: mental fatigue; MO: motivation; TSC: trait self-control.