Table 5. Between-group comparisons of changes in all performance measures from pre- to post-intervention. Data are standard mean difference (SMD) and 95 % CI. Variable Interference effect RT vs. sSIT+RT RT vs. RT+sSIT Order effect sSIT vs. sSIT+RT sSIT vs. RT+sSIT sSIT+RT vs. RT+sSIT CMVJ (cm) -1.00 (-1.98 to 0.09) -1.17 (-2.16 to -0.06) -0.42 (-1.38 to 0.59) -0.53 (-1.53 to 0.46) -0.16 (-1.14 to 0.83) Moderate difference Moderate difference Small difference Small difference Trivial difference 20-m sprint (sec) -0.10 (-1.07 to 0.89) -0.30 (-1.27 to 0.70) -0.37 (-134 to 0.64) -0.57 (-1.53 to 0.46) -0.22 (-1.19 to 0.78) Trivial difference Small difference Small difference Small difference Small difference 4 × 9-m shuttle run (sec) 0.40 (-0.61 to 1.36) 0.11 (-0.87 to 1.09) 0.60 (-0.43 to 1.56) 0.32 (-0.68 to 1.29) -0.31 (-1.28 to 0.69) Small difference Trivial difference Moderate difference Small difference Small difference 1RMLP (kg) -0.15 (-1.13 to 0.83) -0.28 (-1.26 to 0.71) 0.11 (-0.87 to 1.09) -0.01 (-0.99 to 0.97) -0.12 (-1.09 to 0.87) Trivial difference Small difference Trivial difference Trivial difference Trivial difference Peak power output (W) -0.60 (-1.57 to 0.43) -0.73 (-1.70 to 0.32) -0.68 (-1.65 to 0.36) -0.80 (-1.78 to 0.25) -0.12 (-1.10 to 0.86) Moderate difference Moderate difference Moderate difference Moderate difference Trivial difference Mean power output (W) -0.61 (-1.58 to 0.42) -0.48 (-1.70 to 0.32) -0.90 (-1.87 to 0.17) -0.75 (-1.72 to 0.30) 0.6 (-0.92 to 1.04) Moderate difference Small difference Moderate difference Moderate difference Moderate difference V·O2max (ml.kg-1.min-1) 0.26 (-0.74 to 1.23) 0.59 (-0.44 to 1.56) -0.79 (-1.69 to 0.33) -0.36 (-1.33 to 0.65) 0.37 (-0.63 to 1.34) Small difference Small difference Moderate difference Small difference Small difference CMVJ = countermovement vertical jump, 1RMLP = one repetition maximum leg press, sSIT = short sprint interval training, RT = resistance training.