Table 4. Physiological performance changes from pre- to post-intervention (mean ± SD). Variables Groups Pre-intervention Post-intervention Significant Hedge's g (95% CI) Peak power output (W) sSIT 811.1 ± 41.2 874.6 ± 52.4* Time Effect 1.27 (0.20 to 2.35) Large ↑ RT 824.0 ± 54.2 868.0 ± 59.1* 0.001 0.73 (-0.28 to 1.75) Moderate ↑ sSIT+RT 808.3 ± 43.8 908.6 ± 60.3* Group × Time Effect 1.80 (0.64 to 2.96) Large ↑ RT+sSIT 815.1 ± 64.8 916.5 ± 60.4* 0.001 1.53 (0.42 to 2.64) Large ↑ CG 815.8 ± 40.7 816.7 ± 41.1 - Mean power output (W) sSIT 472.6 ± 34.6 504.8 ± 35.5* Time Effect 0.87 (-0.16 to 1.89) Moderate ↑ RT 468.8 ± 39.3 491.7 ± 41.1* 0.001 0.54 (-0.46 to 1.54) Small ↑ sSIT+RT 476.5 ± 31.3 527.5 ± 38.5* Group × Time Effect 1.37 (0.28 to 2.46) Large ↑ RT+sSIT 474.6 ± 38.2 524.8 ± 47.0* 0.001 1.11 (0.42 to 2.64) Moderate ↑ CG 469.5 ± 45.7 470.8 ± 48.3 - V̇O2max (ml.kg-1.min-1) sSIT 42.3 ± 2.8 44.6 ± 3.0* Time Effect 0.75 (-0.26 to 1.76) Moderate ↑ RT 41.9 ± 2.7 42.1 ± 2.6 0.001 0.08 (-0.91 to 1.05) Trivial ↑ sSIT+RT 41.6 ± 2.3 43.9 ± 2.4* Group × Time Effect 0.92 (-0.11 to 1.96) Moderate ↑ RT+sSIT 41.4 ± 2.5 43.0 ± 2.4* 0.001 0.62 (-0.39 to 1.62) Moderate ↑ CG 41.8 ± 2.6 41.9 ± 2.5 - *denotes significant differences in training groups compared with the pre-intervention value and compared with CG at post-intervention (p < 0.05). sSIT = short sprint interval training, RT = resistance training, CG = concurrent training.