Figure 2From: Cardiovascular hemodynamic effects of Red Bull® Energy Drink during prolonged, simulated, monotonous driving Summarized results of the effects of condition (RBED, placebo-control, and no drink) and period (0–30, 30–60 and 60–90 min) on KSS-J. Note: KSS-J = Japanese version of the Karolinska sleepiness scale.Back to article page