Table 3. Results for Run (HIITrun) and Bike (HIITbike) group in pre and post- intervention tests for, lactate values, average pace (Paceav), Time, heart rate average (HRav), maximum heart rate (HRmax), average rating of perceived exertion (RPEav) and maximum rate of perceived exertion (RPEmax) obtained in the 10 km time trial. HIITrun HIITbike Pre test Post test p Dif. (%) ES Pre test Post test p Dif. (%) ES Lactate (mmol/l) 3.3 ± 0.8 6.6 ± 0.9 0.18 3.3 ± 0.6 3.6 5.9 ± 2.5 7.8 ± 4.4 0.23 1.8 ± 3.6 0.4 Paceav (min/km) 5.36 ± 0.8 5.36 ± 0.7 0.91 0.0 ± .5 0.0 5.48 ± 1.3 5.30± 1.0* 0.02 -0.4 ± 0.3 -0.4 Time (min) 57.4 ± 7.3 57.8 ± 6.0 0.84 -0.4 ± 4.5 0.1 59.7 ± 11.9 57.5 ± 10.8 0.06 -2.1 ± 2.5 -0.02 HRav (bpm) 172 ± 9 170 ± 8 0.58 -1.4 ± 6.5 -0.2 169 ± 10 166 ± 12 0.14 -3.6 ± 5.5 -0.3 RPEav (AU) 5 ± 2 7 ± 1* 0.05 1.5 ± 1.6 1.7 6 ± 2 6 ± 2 0.41 0.4 ± 1.3 0.3 RPEmax (AU) 7 ± 2 8 ± 1* 0.04 1.3 ± 1.3 1.6 6 ± 1 8 ± 2* 0.05 1.6 ± 1.7 0.9 Dif. (%) = mean differences in percentage, ES = effect size. *p < 0.05 significant differences with pre test