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. 2019 Aug 7;10:1019. doi: 10.3389/fphys.2019.01019

TABLE 5.

Comparison of pre-/post-training results (Friedman tests).

Friedman test
Post hoc: Dunn-Bonferroni
Chi2(2) p-Value n Z p-Calue r = | z/√n|
sitting meanSD1 0.000 1.000 11
sitting rMSSD 0.182 0.913 11
standing meanRRi 2.182 0.336 11
standing meanSD1 3.818 0.148 11
standing rMSSD 0.182 0.913 11
bending meanSD1 5.636 0.060 11
bending rMSSD 2.364 0.307 11
Workload max 13.688 0.001 11
Baseline 1 vs. final test −2.558 0.032 |0.77|
Baseline 2 vs. final test −2.878 0.012 |0.87|

meanRRi, mean R-R interval; meanSD1; standard deviation of R-R intervals; rMSSD, root-mean-square difference of successive normal R-R intervals. All non-normally distributed data were analyzed with the non-parametric repeated measures comparison (Friedman test). Effect size: r = Pearson correlation coefficient (r = 0.1, small effect; r = 0.3, medium effect; and r = 0.5, large effect). Significance level was established at p < 0.05.