From: Effects of two pre-workout supplements on concentric and eccentric force production during lower body resistance exercise in males and females: a counterbalanced, double-blind, placebo-controlled trial
Maximal Concentric Force
Maximal Eccentric Force
M
F
Max Test
NC
0.27
0.00
0.24
−0.26
C
0.42
0.08
0.09
Exercise Sets
0.43
−0.14
−0.08
−0.15
0.29
−0.06
−0.04
0.02