—The effects of 1, 3, and 6 mg/kg caffeine on vertical jump heights in the CMJ (a) and SJ (b) as well as the eccentric utilization ratio (c). Significant differences versus the placebo condition are shown as *p < .05, **p < .01, and ***p < .001. Values are presented as the median (IQR). Each participant’s result is presented in the plot (black circles). CMJ = countermovement jump; SJ = squat jump; IQR = interquartile range.

Citation: International Journal of Sport Nutrition and Exercise Metabolism 33, 5; 10.1123/ijsnem.2023-0061