Table 4.

Parameters of Strength and Power Prior to and After Resistance Training in Overweight and Obese Men.

	Pretesting, M (SD)	Posttesting, M (SD)	p values	Effect sizes
Maximum voluntary isometric contraction
Peak force (N)	3282.1 (668.9)	3419.8 (541.3)	.263	0.2
Peak RFD (N/ms)	19.7 (5.9)	19.9 (5.6)	.831	—
RFD during 0-100 ms (N/ms)	11.7 (2.3)	11.6 (2.0)	—	—
RFD during 0-200 ms (N/ms)	9.4 (1.6)	9.9 (1.5)	.095	0.3
Squat and countermovement jumps
Peak power of SJ (W)	3719.2 (558.9)	3883.3 (563.8)	.236	0.3
Peak power of SJ (W/kg)	36.6 (4.3)	40.5 (4.9)	.032	0.8
Peak velocity of SJ (m/s)	2.09 (0.3)	2.31 (0.3)	.040	0.7
Height of SJ (cm)	17.9 (2.5)	20.3 (3.1)	.019	0.9
Peak power of CMJ (W)	3905.5 (560.8)	4125.6 (591.8)	.115	0.4
Peak power of CMJ (W/kg)	38.1 (3.9)	42.4 (6.0)	.026	0.9
Peak velocity of CMJ (m/s)	2.23 (0.3)	2.47 (0.4)	.037	0.7
Height of CMJ (cm)	19.8 (2.9)	22.7 (3.3)	.013	0.9
Drop jump
Height of jump (cm)	21.5 (2.2)	22.5 (2.4)	.207	0.4
Reactive strength index (1)	0.83 (0.14)	0.85 (0.17)	.464	0.1

Note. RFD = rate of force development; CMJ = countermovement jump; SJ = squat jump.