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.