Table 5.

Two-way ANOVA (2 groups × 3 repeated measurements) of changes in the serum vitamin D levels induced by the ultramarathon.

Variable	Group	24 H Before The Run (Mean ± SD)	Immediately after The Run (Mean ± SD)	24 H after The Run (Mean ± SD)
25(OH)D [ng/mL]	Supplemented Control	27.50 ± 7.01 26.82 ± 5.22	58.13 ± 18.89 †# 41.06 ± 10.58 †	67.93 ± 25.67 † 49.54 ± 17.76 †

Note: Post-hoc analysis: †, significant difference vs. 24 h before the run; #, significant difference vs. group C immediately after the run. The significance level was set at p < 0.01.