Table 2.

Comparisons of the squat jump (SJ), countermovement jump (CMJ), and horizontal jump (HJ), mean propulsive velocity (MPV) using a load of 40% of the players' body mass in the jump squat exercise, and change of direction (COD) speed pre- and post- a 5-week preseason period for the groups of elite soccer players that performed two different power-oriented training regimes.

	Optimum power load + resisted sprints			Optimum power load + plyometrics
	Pre	Post	ES (90% CL) rating	Pre	Post	ES (90% CL) rating
SJ (cm)	40.6 ± 2.8	40.3 ± 2.7	−0.09 (−0.79; 0.60) trivial	38.7 ± 3.4	39.6 ± 3.0P	0.25 (−0.07; 0.57) small
CMJ (cm)	41.8 ± 2.9	40.6 ± 3.7	−0.39 (−1.03; 0.25) small	39.0 ± 3.9	39.8 ± 3.3P	0.20 (−0.15; 0.55) small
HJ (m)	2.46 ± 0.22	2.45 ± 0.21	−0.03 (−0.37; 0.30) trivial	2.28 ± 0.20	2.37 ± 0.15L	0.40 (0.15; 0.66) small
MPV 40% (m.s−1)	1.27 ± 0.10	1.23 ± 0.11	−0.34 (−1.04; 0.35) small	1.29 ± 0.09	1.30 ± 0.06	0.08 (−0.39; 0.55) trivial
MPP REL JS (W.kg−1)	9.54 ± 0.87	9.41 ± 0.96	−0.13 (−0.64; 0.38) trivial	9.75 ± 0.85	9.69 ± 0.77	−0.06 (−0.46; 0.33) trivial
COD (s)	5.93 ± 0.15	5.78 ± 0.19L	−0.86 (−1.55; −0.17) moderate	6.10 ± 0.20	5.91 ± 0.25AC	−0.87 (−1.18; −0.56) moderate

ES: standardized differences based on Cohen units; CL: confidence limits;

^Ppossibly different from pre;

^Llikely different from pre;

^ACalmost certainly different from pre.