- * = performance fatigability is indicated by the relative percentage increase in split times during ITT compared to CTT and assessed via one-way repeated measures ANOVA. (*) = blood interleukin-6 concentrations violated the assumption of normal distribution and thus non-parametric ANOVA after aligned rank transformation was conducted. For details, see Additional file 1. Note: shaded areas significant at p < .05; TT = time trial; ITT = intervention time trial; CTT = control time trial; DJ = drop-jump protocol