Fig. 3From: Effect of whey vs. soy protein supplementation on recovery kinetics following speed endurance training in competitive male soccer players: a randomized controlled trialChanges in creatine kinase (CK) activity (a) and delayed onset of muscle soreness (DOMS) of the knee extensors (b) and knee flexors (c) of the DL. a denotes a significant difference with pre in placebo trial at P < 0.05. b denotes a significant difference with pre in whey trial at P < 0.05. c denotes a significant difference with pre in soy trial at P < 0.05Back to article page