Fig. 3From: Effects of caffeine supplementation on anaerobic power and muscle activity in youth athletesMean and standard deviations of the normalized median power frequency of the RF, VL, VM, BF, and GS during six Wingate splits for all participants in the CAF and PL conditions. RF, rectus femoris; VL, vastus lateralis; VM, vastus medialis; BF, biceps femoris; GS, Gastrocnemius; CAF, caffeine; PL, placebo; s, secondBack to article page