Plasma ALT (U/L) and AST (U/L). (A) Plasma ALT increased (1P < 0.05 vs. 24-h, 48-h, 72-h, and 168-h) in the placebo group days after the exercise protocol compared to those at Post and 1-h. Plasma ALT was significantly (2P < 0.05 vs. Bsl, Pre, 24-h, 48-h, and 72-h) decreased at Post in the supplemental vitamin D group. Supplemental vitamin D significantly (*P < 0.05) decreased ALT compared to the placebo group at 168-h. (B) Plasma AST significantly (3P < 0.05, 48-h vs. Bsl and 1-h; 4P < 0.05, 72-h vs. Bsl, Pre, 1-hr, and 24-hr; 5P < 0.05, 168-h vs. 1-h) increased in the placebo group during the days following the exercise protocol. In the supplemental vitamin D group, plasma AST was significantly increased at Post (6P < 0.05, vs. Bsl; 7P < 0.05 vs. 1-h), 48-h (6P < 0.05, vs. Bsl), and 168-h (6P < 0.05, vs. Bsl). Supplemental vitamin D significantly (*P < 0.05) attenuated the AST increase at 48-h and 72-h compared to those in the placebo group. Figure legend provided in ‘A’. Data presented as mean (SD).