Fig 1: Differences in (A) plasma SELENOP levels and (B) mtDNA CN between non-exercise and regular-exercise groups (N= 44 for each group). mtDNA CN was calculated by 2-?CT values of mitochondrial ND1 gene copy number normalized to nuclear HBB gene. Fold changes in 2-?CT were compared between the non-exercise group and regular-exercise group. Data are presented with mean ± SD.***p<0.001 by Student’s unpaired t-test for plasma SELENOP levels and Mann-Whitney U test for mtDNA CN, respectively.