Fig. 7From: The physiological and perceptual effects of plant extracts (Catha Edulis Forsk) during sustained exerciseThis shows the mean and SEM of temperature for all volunteers after taking either the placebo (P) or khat (K). Red symbols indicate the placebo day and black the khat day. The temperature rises after khat consumption and falls later after 20Â min. While temperature rises for 10Â min after consuming the placebo then it becomes unstableBack to article page