Figure 3From: Ergogenic effects of caffeine and sodium bicarbonate supplementation on intermittent exercise performance preceded by intense arm cranking exercise Rating of Perceived Exertion (RPE) at 160 and 280 m during the Yo-Yo IR2 test, as well as at exhaustion in PLA, CAF and NaHCO 3 . *Denotes a significant difference from PLA. Significance level P < 0.05.Back to article page