Figure 3. The effect of HIIT spinning exercise on prostaglandin metabolite levels. Blood samples were obtained from the Control, Dysmen, and DysmenHIIT groups approximately three days before menstruation. Levels of the prostaglandins PGE2 (A) and PGF2α (B) were assessed before and after the 10-week HIIT exercise training program. The data are presented as means ± SD. Superscripts numbers (1, 2, and 3) indicate significant differences (P < 0.05) between the groups. as evaluated by a one-way analysis of variance (ANOVA). ‘*’ represents significant differences within groups.