Table 2. Isometric quadriceps contractile performance before and after fatiguing isokinetic exercise.

Isometric contractile performance (60° knee flexion) was assessed through an interpolated twitch experiment before and one minute after completion of a fatiguing exercise protocol consisting of three sets of 10 maximal-effort concentric and eccentric isokinetic (60°∙s⁻¹) knee extension over a range of 60° with 30s rest between sets. Peak twitch force, rate of force development, and relaxation rate were determined from resting twitch data. Post-activation Potentiation was calculated as the % change in peak twitch force before and after MVIC. MVIC: Maximal Voluntary Isometric Contraction. Significant differences (two-tailed paired t-test) are denoted by bold text.

Parameter	Time	Mean		SD	Min	Max	p-value	Cohen’s D
Peak Twitch Force (N∙cm−2)	Pre	24.2	±	9.0	12.2	40.2	0.114	0.495
	Post	20.0	±	7.7	9.9	36.6
Rate of Force Development (N∙cm−2∙s−1)	Pre	242.3	±	97.8	103.6	390.1	0.013	0.850
	Post	177.9	±	62.8	85.1	313.2
Potentiation (% Peak twitch force)	Pre	7.33	±	25.9	−29.6	52.9	0.953	−0.017
	Post	9.29	±	11.2	−5.0	29.1
MVIC Specific Tension (N∙cm−2)	Pre	89.2	±	20.3	63.5	123.6	0.002	1.151
	Post	71.3	±	14.7	43.6	90.8
Voluntary Activation (%)	Pre	92.1	±	6.9	74.2	99.0	0.978	0.087
	Post	92.7	±	5.4	81.2	99.0