In 2014, A study done by Lara et. al observed the effectiveness of caffeine on anaerobic exercise in female soccer players. In two different sessions, 18 women soccer players (age of 21 ± 2 years) drank caffeine or a placebo drink an hour before performance. The players then executed a countermovement jump (CMJ) a sprint test, and finished with a simulated soccer match. The pre-exercise ingestion of caffeine increased mean jump height and showed an increase in peak power during the CMJ test. In addition, the caffeinated energy drink showed an increased average peak running speed during the sprint test and total running distance during a soccer …show more content…
In 2015, Salazar et. al determined there were any significant differences in the effectiveness of caffeine to enhance physical performance in elite junior tennis players. In a double-blind, placebo-controlled, and randomized experimental design, 14 young elite-level tennis players around the age of 16 ingested a caffeine drink or a placebo for comparison and participated in a handgrip-strength test, maximal-velocity serving test, a sprint test then played a simulated singles match. After the tennis match, the caffeine drink group scored more points won on service than the placebo group. The caffeinated group also showed an increased number of sprints and an increase in maximal running velocity during the sprint test compared to the placebo. However, the energy drink did not improve ball velocity during the serving