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Table 3 Changes of inter-cerebral phase-locking values (ΔPLV α and ΔPLV β) from early to middle and from early to late pedal stages

From: Resistance-induced brain activity changes during cycle ergometer exercises

Inter-cerebral pairs ΔPLV α Δ PLV β
Middle - Early Late - Early Middle - Early Late - Early
C3-Cz
Low-intensity 0.044 (0.186) 0.012 (0.247) 0.026 (0.208) 0.033 (0.140)
High-intensity 0.023 (0.073) 0.025 (0.170) −0.034 (0.036) 0.052 (0.111)
p-value 0.5004 0.8544 0.2616 0.0333*
z-score 0.765 0.051 −1.070 2.090
Effect size, ρ 0.171 0.011 −0.239 0.467
P3-Pz
Low-intensity 0.017 (0.092) 0.005 (0.112) −0.028 (0.087) −0.026 (0.086)
High-intensity −0.028 (0.131) 0.002 (0.068) 0.004 (0.162) 0.040 (0.155)
p-value 0.7840 0.4312 0.0091* 0.0412*
z-score −0.051 0.561 2.497 1.886
Effect size, ρ −0.011 0.125 0.558 0.422
P3-P4
Low-intensity −0.012 (0.148) −0.029 (0.121) − 0.065 (0.097) −0.082 (0.084)
High-intensity 0.037 (0.259) 0.054 (0.250) −0.054 (0.149) 0.019 (0.127)
p-value 0.9261 0.0165* 0.7766 0.0147*
z-score −0.255 2.293 0.153 2.293
Effect size, ρ −0.057 0.513 0.034 0.513
  1. PLV changes (Middle - Early, Late - Early) are represented as median (interquartile range). ΔPLVα and ΔPLVβ are the changes in the alpha- and beta-band PLV between pedal stages. The paired permutation test is used to compare the distributions of PLV changes between low- and high-resistance exercises, where the mark * indicates a significance level of p < 0.05. The effect size is reported as the correlation coefficient ρ based on the Wilcoxon signed-rank test