Table 5. Differences in measures of neuromuscular performance in participants, analyzed using 2 x 2 x 2 (time x group x maturity) repeated measures ANOVAs. P-values are presented for 3-way and 2-way interaction effects and for the main effects. 20-m sprint (s) CMJ (cm) SJ (cm) RSI (mm/ms) Isokinetic strength (Nm) Time x group x maturity p = 0.368 p = 0.687 p = 0.128 p = 0.032 p = 0.384 Time x group p < 0.001 p < 0.001 p = 0.008 p < 0.001 p < 0.001 Time x maturity p = 0.015 p = 0.605 p = 0.159 p = 0.319 p = 0.416 Group x maturity p = 0.435 p = 0.607 p = 0.682 p = 0.481 p = 0.735 Time p < 0.001 p = 0.009 p = 0.001 p = 0.002 p < 0.001 Group p = 0.396 p = 0.616 p = 0.476 p = 0.776 p = 0.828 Maturity p = 0.001 p = 0.003 p = 0.010 p = 0.081 p < 0.001 PHV = peak height velocity; CMJ = countermovement jump; SJ = squat jump; RSI = reactive strength index. “Time” denotes pre- to post-training data, “group” represents jump training group or control group, and “maturity” refers to pre- vs. post-PHV.